Added apple gamekit auth

Untested rn

package.json

@@ -23,11 +23,13 @@
     "@parse/push-adapter": "3.0.0-alpha2",
     "@parse/s3-files-adapter": "1.2.1",
     "@parse/simple-mailgun-adapter": "1.0.2",
+    "bcrypt": "3.0.0",
     "bcryptjs": "2.4.3",
     "body-parser": "1.18.3",
     "commander": "2.16.0",
     "deepcopy": "1.0.0",
     "express": "4.16.2",
+    "gamecenter-identity-verifier": "^0.1.1",
     "intersect": "1.0.1",
     "jsonwebtoken": "^8.5.1",
     "jwks-rsa": "^1.12.3",
@@ -43,6 +45,7 @@
     "steam-appticket": "1.0.1",
     "tv4": "1.3.0",
     "uuid": "^3.1.0",
+    "uws": "10.148.1",
     "winston": "2.4.1",
     "winston-daily-rotate-file": "1.7.2",
     "ws": "6.0.0"