diff --git a/package-lock.json b/package-lock.json
index a6ab1c6..714dd7b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -75,7 +75,7 @@
       "dependencies": {
         "acorn": {
           "version": "3.3.0",
-          "resolved": "http://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz",
           "integrity": "sha1-ReN/s56No/JbruP/U2niu18iAXo=",
           "dev": true
         }
@@ -170,7 +170,8 @@
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       "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
-      "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ="
+      "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=",
+      "optional": true
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@@ -207,15 +208,24 @@
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       "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
-      "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c="
+      "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c=",
+      "optional": true
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-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.1.tgz",
-      "integrity": "sha512-fNEiL2+AZt6AlAw/29Cr0UDe4sRAHCpEHh54WMz+Bb7QfNcFw4h3loofyJpLeQs4Yx7yuqu/2dLgM5hKOs6HlQ==",
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
       "dev": true,
       "requires": {
-        "lodash": "^4.17.10"
+        "lodash": "^4.17.14"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.21",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+          "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
+          "dev": true
+        }
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@@ -233,7 +243,8 @@
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+      "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==",
+      "optional": true
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@@ -1106,6 +1117,7 @@
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+      "optional": true,
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@@ -1120,6 +1132,7 @@
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           "integrity": "sha1-dp66rz9KY6rTr56NMEybvnm/sOY=",
+          "optional": true,
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@@ -1128,6 +1141,7 @@
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+          "optional": true,
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@@ -1136,6 +1150,7 @@
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+          "optional": true,
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@@ -1144,6 +1159,7 @@
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+          "optional": true,
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@@ -1153,12 +1169,14 @@
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-          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8="
+          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
+          "optional": true
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+          "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==",
+          "optional": true
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@@ -1231,7 +1249,7 @@
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-          "resolved": "http://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
+          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
           "integrity": "sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=",
           "dev": true
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@@ -1290,6 +1308,7 @@
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+      "optional": true,
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@@ -1305,7 +1324,8 @@
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           "resolved": "https://registry.npmjs.org/isobject/-/isobject-3.0.1.tgz",
-          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8="
+          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
+          "optional": true
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@@ -1360,7 +1380,7 @@
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-      "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
       "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
       "requires": {
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@@ -1408,6 +1428,7 @@
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+      "optional": true,
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@@ -1419,6 +1440,7 @@
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           "integrity": "sha1-w1se+RjsPJkPmlvFe+BKrOxcgRY=",
+          "optional": true,
           "requires": {
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@@ -1426,7 +1448,8 @@
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-          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8="
+          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
+          "optional": true
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@@ -1450,7 +1473,7 @@
       "dependencies": {
         "colors": {
           "version": "1.0.3",
-          "resolved": "http://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
+          "resolved": "https://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
           "integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs=",
           "dev": true
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@@ -1517,6 +1540,7 @@
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       "resolved": "https://registry.npmjs.org/collection-visit/-/collection-visit-1.0.0.tgz",
       "integrity": "sha1-S8A3PBZLwykbTTaMgpzxqApZ3KA=",
+      "optional": true,
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         "object-visit": "^1.0.0"
@@ -1557,7 +1581,8 @@
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-      "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY="
+      "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=",
+      "optional": true
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@@ -1599,7 +1624,8 @@
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       "resolved": "https://registry.npmjs.org/copy-descriptor/-/copy-descriptor-0.1.1.tgz",
-      "integrity": "sha1-Z29us8OZl8LuGsOpJP1hJHSPV40="
+      "integrity": "sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=",
+      "optional": true
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     "core-js": {
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@@ -1677,7 +1703,8 @@
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-      "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU="
+      "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
+      "optional": true
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@@ -1706,6 +1733,7 @@
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+      "optional": true,
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@@ -1715,6 +1743,7 @@
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+          "optional": true,
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@@ -1723,6 +1752,7 @@
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+          "optional": true,
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@@ -1731,6 +1761,7 @@
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@@ -1740,12 +1771,14 @@
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-          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8="
+          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
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+          "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==",
+          "optional": true
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@@ -2013,7 +2046,7 @@
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-          "resolved": "http://registry.npmjs.org/slice-ansi/-/slice-ansi-0.0.4.tgz",
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@@ -2115,7 +2148,7 @@
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-          "resolved": "http://registry.npmjs.org/doctrine/-/doctrine-1.5.0.tgz",
+          "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-1.5.0.tgz",
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@@ -2297,6 +2330,7 @@
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       "integrity": "sha1-Jqcarwc7OfshJxcnRhMcJwQCjbg=",
+      "optional": true,
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@@ -2306,6 +2340,7 @@
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+          "optional": true,
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@@ -2480,6 +2515,7 @@
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       "integrity": "sha1-QpD60n8T6Jvn8zeZxrxaCr//DRk=",
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@@ -2521,7 +2557,8 @@
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         "ansi-regex": {
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+          "bundled": true,
+          "optional": true
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@@ -2539,11 +2576,13 @@
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-          "bundled": true
+          "bundled": true,
+          "optional": true
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+          "optional": true,
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@@ -2556,15 +2595,18 @@
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-          "bundled": true
+          "bundled": true,
+          "optional": true
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+          "bundled": true,
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@@ -2667,7 +2709,8 @@
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@@ -2677,6 +2720,7 @@
         "is-fullwidth-code-point": {
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@@ -2689,17 +2733,20 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
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         "minimist": {
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-          "bundled": true
+          "bundled": true,
+          "optional": true
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@@ -2716,6 +2763,7 @@
         "mkdirp": {
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           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -2788,7 +2836,8 @@
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@@ -2798,6 +2847,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
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@@ -2873,7 +2923,8 @@
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@@ -2903,6 +2954,7 @@
         "string-width": {
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@@ -2920,6 +2972,7 @@
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -2958,11 +3011,13 @@
         },
         "wrappy": {
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+          "bundled": true,
+          "optional": true
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         "yallist": {
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+          "bundled": true,
+          "optional": true
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@@ -3014,7 +3069,8 @@
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-      "integrity": "sha1-3BXKHGcjh8p2vTesCjlbogQqLCg="
+      "integrity": "sha1-3BXKHGcjh8p2vTesCjlbogQqLCg=",
+      "optional": true
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@@ -3167,6 +3223,7 @@
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       "resolved": "https://registry.npmjs.org/has-value/-/has-value-1.0.0.tgz",
       "integrity": "sha1-GLKB2lhbHFxR3vJMkw7SmgvmsXc=",
+      "optional": true,
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@@ -3176,7 +3233,8 @@
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-          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8="
+          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
+          "optional": true
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