docs: add acjohnson as a contributor for code (#1352)

* docs: update .github/README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Co-authored-by: Kjeld Schouten-Lebbing <kjeld@schouten-lebbing.nl>

.all-contributorsrc

@@ -136,6 +136,15 @@
         "doc"
       ]
     },
+    {
+      "login": "acjohnson",
+      "name": "Aaron Johnson",
+      "avatar_url": "https://avatars.githubusercontent.com/u/1386238?v=4",
+      "profile": "http://aaronjohnson.io",
+      "contributions": [
+        "doc"
+      ]
+    },
     {
       "login": "ralphte",
       "name": "Ralph",
@@ -144,6 +153,33 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "joachimbaten",
+      "name": "Joachim Baten",
+      "avatar_url": "https://avatars.githubusercontent.com/u/2351765?v=4",
+      "profile": "http://www.abc-groep.be",
+      "contributions": [
+        "code"
+      ]
+    },
+    {
+      "login": "mxyng",
+      "name": "Michael Yang",
+      "avatar_url": "https://avatars.githubusercontent.com/u/2372640?v=4",
+      "profile": "https://github.com/mxyng",
+      "contributions": [
+        "code"
+      ]
+    },
+    {
+      "login": "cTurtle98",
+      "name": "Ciaran Farley",
+      "avatar_url": "https://avatars.githubusercontent.com/u/24465356?v=4",
+      "profile": "http://cturtle98.com",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,