docs: add bopfer as a contributor (#240)

* docs: update README.md

* docs: update .all-contributorsrc


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

Author: allcontributors[bot]

.all-contributorsrc

@@ -527,6 +527,16 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "bopfer",
+      "name": "bopfer",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/824368?v=4",
+      "profile": "https://github.com/bopfer",
+      "contributions": [
+        "test"
+      ]
     }
-  ]
+  ],
+  "repoHost": "https://github.com"
 }