docs: add DylanPiercey as a contributor (#289)

* docs: update README.md

* docs: update .all-contributorsrc


Co-authored-by: null <allcontributors[bot]@users.noreply.github.com>

Author: allcontributors[bot]

.all-contributorsrc

@@ -603,6 +603,16 @@
         "code",
         "test"
       ]
+    },
+    {
+      "login": "DylanPiercey",
+      "name": "Dylan Piercey",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/4985201?v=4",
+      "profile": "https://twitter.com/dylan_piercey",
+      "contributions": [
+        "code",
+        "test"
+      ]
     }
   ],
   "repoHost": "https://github.com"