chore: remove unused modules

Author: AVVS

package.json

@@ -57,7 +57,6 @@
     "eslint-config-makeomatic": "^2.0.1",
     "eslint-plugin-import": "^2.8.0",
     "eslint-plugin-promise": "^3.6.0",
-    "github-post-release": "^1.13.1",
     "ioredis": "^3.2.2",
     "jest-cli": "^22.0.4",
     "mocha": "^4.1.0",