chore(package): update publish-please to version 4.0.0

Author: greenkeeper[bot]

package.json

@@ -85,7 +85,7 @@
     "mocha": "^5.2.0",
     "phaser-ce": "^2.11.0",
     "prettier": "^1.14.3",
-    "publish-please": "^3.2.0",
+    "publish-please": "^4.0.0",
     "reflect-metadata": "^0.1.12",
     "remap-istanbul": "^0.12.0",
     "rimraf": "^2.6.2",