docs: update .all-contributorsrc [skip ci]

allcontributors[bot] · web-flow · commit 341119d7adaf · 2020-03-21T17:15:49.000Z
diff --git a/.all-contributorsrc b/.all-contributorsrc
@@ -43,6 +43,15 @@
         "code",
         "test"
       ]
+    },
+    {
+      "login": "oliver-xapix-io",
+      "name": "Oliver Thamm",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/13470858?v=4",
+      "profile": "https://github.com/oliver-xapix-io",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,
