change author to OpenZeppelin Community (#1173)

ethpm.json

@@ -3,7 +3,7 @@
   "version": "1.11.0",
   "description": "Secure Smart Contract library for Solidity",
   "authors": [
-    "Manuel Araoz <manuelaraoz@gmail.com>"
+    "OpenZeppelin Community <maintainers@openzeppelin.org>"
   ],
   "keywords": [
     "solidity",

package.json

@@ -30,7 +30,7 @@
     "security",
     "zeppelin"
   ],
-  "author": "Manuel Araoz <manuelaraoz@gmail.com>",
+  "author": "OpenZeppelin Community <maintainers@openzeppelin.org>",
   "license": "MIT",
   "bugs": {
     "url": "https://github.com/OpenZeppelin/zeppelin-solidity/issues"