chore(package): correct author & contributors field

Author: RomainLanz

package.json

@@ -37,7 +37,11 @@
     "env",
     "adonisjs"
   ],
-  "author": "virk,adonisjs",
+  "author": "Harminder Virk <virk@adonisjs.com>",
+  "contributors": [
+    "Romain Lanz <romain.lanz@pm.me>",
+    "Julien Ripouteau <julien@ripouteau.com>"
+  ],
   "license": "MIT",
   "devDependencies": {
     "@adonisjs/eslint-config": "^1.3.0",