deps: Add eslint plugins for prettier (#323)

package.json

@@ -67,7 +67,9 @@
     "@typescript-eslint/parser": "^2.34.0",
     "@zeit/ncc": "^0.22.3",
     "eslint": "^6.8.0",
+    "eslint-config-prettier": "^6.11.0",
     "eslint-plugin-jest": "^23.13.1",
+    "eslint-plugin-prettier": "^3.1.3",
     "husky": "^4.2.5",
     "jest": "^25.5.4",
     "jest-circus": "^26.0.1",