pin prettier

Author: Moumouls

package.json

@@ -74,7 +74,7 @@
     "lint-staged": "^10.5.3",
     "metro-react-native-babel-preset": "0.59.0",
     "parse-server": "github:parse-community/parse-server#master",
-    "prettier": "^2.2.1",
+    "prettier": "2.2.1",
     "regenerator-runtime": "0.13.5",
     "vinyl-source-stream": "2.0.0"
   },