docs: add adityaas26 as a contributor (#469)

* docs: update README.md

* docs: update .all-contributorsrc

Author: allcontributors[bot]

.all-contributorsrc

@@ -510,6 +510,15 @@
         "code",
         "infra"
       ]
+    },
+    {
+      "login": "adityaas26",
+      "name": "Aditya Sharma",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/24931529?v=4",
+      "profile": "http://adityasharma.me",
+      "contributions": [
+        "maintenance"
+      ]
     }
   ],
   "contributorsPerLine": 7,