docs: add anuraghazra as a contributor (codesandbox#3530)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

Author: allcontributors[bot]

.all-contributorsrc

@@ -1522,6 +1522,15 @@
         "bug",
         "code"
       ]
+    },
+    {
+      "login": "anuraghazra",
+      "name": "Anurag Hazra",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/35374649?v=4",
+      "profile": "http://anuraghazra.github.io",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,