diff --git a/package-lock.json b/package-lock.json
index 9315f61..efb2650 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1118,8 +1118,12 @@
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@@ -1322,6 +1326,23 @@
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@@ -1488,6 +1508,110 @@
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@@ -2879,6 +2999,11 @@
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@@ -5344,6 +5477,11 @@
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+        "serialize-javascript": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-4.0.0.tgz",
+          "integrity": "sha512-GaNA54380uFefWghODBWEGisLZFj00nS5ACs6yHa9nLqlLpVLO8ChDGeKRjZnV4Nh4n0Qi7nhYZD/9fCPzEqkw==",
+          "requires": {
+            "randombytes": "^2.1.0"
+          }
+        }
+      }
+    },
     "vue-hot-reload-api": {
       "version": "2.3.4",
       "resolved": "https://registry.npmjs.org/vue-hot-reload-api/-/vue-hot-reload-api-2.3.4.tgz",
@@ -8546,6 +8733,15 @@
       "resolved": "https://registry.npmjs.org/vuex/-/vuex-3.4.0.tgz",
       "integrity": "sha512-ajtqwEW/QhnrBZQsZxCLHThZZaa+Db45c92Asf46ZDXu6uHXgbfVuBaJ4gzD2r4UX0oMJHstFwd2r2HM4l8umg=="
     },
+    "vuex-persistedstate": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/vuex-persistedstate/-/vuex-persistedstate-3.2.0.tgz",
+      "integrity": "sha512-1Q4zV9cNaJtl59jN6rXbndemEtXKywZr0OFZnqgpYdwvdyy+64KNsEltKldQW+i03st5LuDwHsdOEevXIZUgdg==",
+      "requires": {
+        "deepmerge": "^4.2.2",
+        "shvl": "^2.0.2"
+      }
+    },
     "watchpack": {
       "version": "1.7.2",
       "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-1.7.2.tgz",
@@ -9025,6 +9221,20 @@
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
       "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
+    },
+    "zen-observable": {
+      "version": "0.8.15",
+      "resolved": "https://registry.npmjs.org/zen-observable/-/zen-observable-0.8.15.tgz",
+      "integrity": "sha512-PQ2PC7R9rslx84ndNBZB/Dkv8V8fZEpk83RLgXtYd0fwUgEjseMn1Dgajh2x6S8QbZAFa9p2qVCEuYZNgve0dQ=="
+    },
+    "zen-observable-ts": {
+      "version": "0.8.21",
+      "resolved": "https://registry.npmjs.org/zen-observable-ts/-/zen-observable-ts-0.8.21.tgz",
+      "integrity": "sha512-Yj3yXweRc8LdRMrCC8nIc4kkjWecPAUVh0TI0OUrWXx6aX790vLcDlWca6I4vsyCGH3LpWxq0dJRcMOFoVqmeg==",
+      "requires": {
+        "tslib": "^1.9.3",
+        "zen-observable": "^0.8.0"
+      }
     }
   }
 }
diff --git a/yarn.lock b/yarn.lock
index ce4383b..3a24901 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1573,10 +1573,10 @@ bluebird@^3.1.1, bluebird@^3.5.1, bluebird@^3.5.5:
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.2.tgz#9f229c15be272454ffa973ace0dbee79a1b0c36f"
   integrity sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==
 
-bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.4.0:
-  version "4.11.9"
-  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.9.tgz#26d556829458f9d1e81fc48952493d0ba3507828"
-  integrity sha512-E6QoYqCKZfgatHTdHzs1RRKP7ip4vvm+EyRUeE2RF0NblwVvb0p6jSVeNTOFxPn26QXN2o6SMfNxKp6kU8zQaw==
+bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.11.9:
+  version "4.12.0"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
+  integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
 
 bn.js@^5.1.1:
   version "5.1.2"
@@ -1635,7 +1635,7 @@ braces@~3.0.2:
   dependencies:
     fill-range "^7.0.1"
 
-brorand@^1.0.1:
+brorand@^1.0.1, brorand@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.1.0.tgz#12c25efe40a45e3c323eb8675a0a0ce57b22371f"
   integrity sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8=
@@ -2563,17 +2563,17 @@ electron@^7.0.0:
     extract-zip "^1.0.3"
 
 elliptic@^6.0.0, elliptic@^6.5.2:
-  version "6.5.2"
-  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.2.tgz#05c5678d7173c049d8ca433552224a495d0e3762"
-  integrity sha512-f4x70okzZbIQl/NSRLkI/+tteV/9WqL98zx+SQ69KbXxmVrmjwsNUPn/gYJJ0sHvEak24cZgHIPegRePAtA/xw==
+  version "6.5.4"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.4.tgz#da37cebd31e79a1367e941b592ed1fbebd58abbb"
+  integrity sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==
   dependencies:
-    bn.js "^4.4.0"
-    brorand "^1.0.1"
+    bn.js "^4.11.9"
+    brorand "^1.1.0"
     hash.js "^1.0.0"
-    hmac-drbg "^1.0.0"
-    inherits "^2.0.1"
-    minimalistic-assert "^1.0.0"
-    minimalistic-crypto-utils "^1.0.0"
+    hmac-drbg "^1.0.1"
+    inherits "^2.0.4"
+    minimalistic-assert "^1.0.1"
+    minimalistic-crypto-utils "^1.0.1"
 
 emoji-regex@^7.0.1:
   version "7.0.3"
@@ -3445,7 +3445,7 @@ he@^1.1.0:
   resolved "https://registry.yarnpkg.com/he/-/he-1.2.0.tgz#84ae65fa7eafb165fddb61566ae14baf05664f0f"
   integrity sha512-F/1DnUGPopORZi0ni+CvrCgHQ5FyEAHRLSApuYWMmrbSwoN2Mn/7k+Gl38gJnR7yyDZk6WLXwiGod1JOWNDKGw==
 
-hmac-drbg@^1.0.0:
+hmac-drbg@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/hmac-drbg/-/hmac-drbg-1.0.1.tgz#d2745701025a6c775a6c545793ed502fc0c649a1"
   integrity sha1-0nRXAQJabHdabFRXk+1QL8DGSaE=
@@ -4263,7 +4263,7 @@ minimalistic-assert@^1.0.0, minimalistic-assert@^1.0.1:
   resolved "https://registry.yarnpkg.com/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz#2e194de044626d4a10e7f7fbc00ce73e83e4d5c7"
   integrity sha512-UtJcAD4yEaGtjPezWuO9wC4nwUnVH/8/Im3yEHQP4b67cXlD/Qr9hdITCU1xDbSEXg2XKNaP8jsReV7vQd00/A==
 
-minimalistic-crypto-utils@^1.0.0, minimalistic-crypto-utils@^1.0.1:
+minimalistic-crypto-utils@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz#f6c00c1c0b082246e5c4d99dfb8c7c083b2b582a"
   integrity sha1-9sAMHAsIIkblxNmd+4x8CDsrWCo=