refactor: remove DI framework

package.json

@@ -35,7 +35,6 @@
     "axios": "^0.19.2",
     "discord.js": "~12.2.0",
     "dotenv": "~8.2.0",
-    "inversify": "~5.0.1",
     "mongodb": "~3.6.0",
     "pg": "^8.3.0",
     "reflect-metadata": "~0.1.13",
@@ -55,6 +54,7 @@
     "@types/mongodb": "~3.5.25",
     "@types/node": "~14.0.27",
     "@types/reflect-metadata": "^0.1.0",
+    "@types/shortid": "^0.0.29",
     "@types/sinon": "^9.0.4",
     "@types/winston": "~2.4.4",
     "@typescript-eslint/eslint-plugin": "^3.6.1",