docs: add micuat as a contributor (#466)

* docs: update README.md

* docs: update .all-contributorsrc

Author: allcontributors[bot]

.all-contributorsrc

@@ -481,6 +481,15 @@
         "maintenance",
         "code"
       ]
+    },
+    {
+      "login": "micuat",
+      "name": "Naoto HIÉDA",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/1835081?v=4",
+      "profile": "http://naotohieda.com",
+      "contributions": [
+        "maintenance"
+      ]
     }
   ],
   "contributorsPerLine": 7,