docs: add dhhagan as a contributor for code, test, and 2 more

.all-contributorsrc

@@ -0,0 +1,29 @@
+{
+  "files": [
+    "README.md"
+  ],
+  "imageSize": 100,
+  "commit": false,
+  "commitType": "docs",
+  "commitConvention": "angular",
+  "contributors": [
+    {
+      "login": "dhhagan",
+      "name": "David H Hagan",
+      "avatar_url": "https://avatars.githubusercontent.com/u/4370504?v=4",
+      "profile": "https://www.davidhagan.me",
+      "contributions": [
+        "code",
+        "test",
+        "doc",
+        "content"
+      ]
+    }
+  ],
+  "contributorsPerLine": 7,
+  "skipCi": true,
+  "repoType": "github",
+  "repoHost": "https://github.com",
+  "projectName": "py-smps",
+  "projectOwner": "quant-aq"
+}

README.md

@@ -1,8 +1,11 @@
+
 [![PyPI version](https://badge.fury.io/py/py-smps.svg)](https://badge.fury.io/py/py-smps)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![Coverage Status](https://coveralls.io/repos/github/dhhagan/py-smps/badge.svg?branch=master)](https://coveralls.io/github/dhhagan/py-smps?branch=master)
 [![ci.tests](https://github.com/quant-aq/py-smps/actions/workflows/test-and-report.yml/badge.svg)](https://github.com/quant-aq/py-smps/actions/workflows/test-and-report.yml)
-
+<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors-)
+<!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 # py-smps
 
@@ -50,17 +53,26 @@ We welcome all contributions from the community in the form of issues reporting,
 
 If there is a feature you would like to see or a bug you would like to report, please open an issue. We will try to get to things as promptly as possible. Otherwise, feel free to send PR's!
 
-### Contributors
+### Contributors ✨
+
+Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore-start -->
 <!-- markdownlint-disable -->
-
+<table>
+  <tbody>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="https://www.davidhagan.me"><img src="https://avatars.githubusercontent.com/u/4370504?v=4?s=100" width="100px;" alt="David H Hagan"/><br /><sub><b>David H Hagan</b></sub></a><br /><a href="https://github.com/quant-aq/py-smps/commits?author=dhhagan" title="Code">💻</a> <a href="https://github.com/quant-aq/py-smps/commits?author=dhhagan" title="Tests">⚠️</a> <a href="https://github.com/quant-aq/py-smps/commits?author=dhhagan" title="Documentation">📖</a> <a href="#content-dhhagan" title="Content">🖋</a></td>
+    </tr>
+  </tbody>
+</table>
 <!-- markdownlint-restore -->
 <!-- prettier-ignore-end -->
-
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!
+
 
 # Documentation
 
@@ -78,3 +90,4 @@ $ cd ..
 ```
 
 Then, you can navigate to your local directory at `docs/build/html/` and open up the `index.html` file in your preferred browser window.
+