docs: add alexkrolick as a contributor (#99)

* docs: update README.md

* docs: update .all-contributorsrc

Author: allcontributors[bot]

.all-contributorsrc

@@ -5,6 +5,24 @@
   "imageSize": 100,
   "commit": false,
   "contributors": [
+    {
+      "login": "kentcdodds",
+      "name": "Kent C. Dodds",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/1500684?v=4",
+      "profile": "https://kentcdodds.com",
+      "contributions": [
+        "maintenance"
+      ]
+    },
+    {
+      "login": "alexkrolick",
+      "name": "Alex Krolick",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/1571667?v=4",
+      "profile": "https://alexkrolick.com",
+      "contributions": [
+        "maintenance"
+      ]
+    },
     {
       "login": "co16353sidak",
       "name": "Sidak Singh Aulakh",
@@ -16,15 +34,6 @@
         "code"
       ]
     },
-    {
-      "login": "kentcdodds",
-      "name": "Kent C. Dodds",
-      "avatar_url": "https://avatars0.githubusercontent.com/u/1500684?v=4",
-      "profile": "https://kentcdodds.com",
-      "contributions": [
-        "maintenance"
-      ]
-    }
   ],
   "contributorsPerLine": 7,
   "projectName": "testing-library-docs",