chore: Centralise ESLint rules (#2162)

* chore: centrilize eslint rules

packages/medusa-interfaces/package.json

@@ -27,11 +27,9 @@
     "@babel/preset-typescript": "^7.13.0",
     "@babel/runtime": "^7.9.6",
     "cross-env": "^5.2.1",
-    "eslint": "^6.8.0",
     "jest": "^25.5.2",
     "medusa-core-utils": "^1.1.31",
     "medusa-test-utils": "^1.1.37",
-    "prettier": "^1.19.1",
     "typeorm": "^0.2.29",
     "typescript": "^4.4.4"
   },