sync latest rn (#165)

* sync latest rn

Author: khalisafkari

template/android/gradle.properties

@@ -25,4 +25,4 @@ android.useAndroidX=true
 android.enableJetifier=true
 
 # Version of flipper SDK to use with React Native
-FLIPPER_VERSION=0.37.0
+FLIPPER_VERSION=0.54.0

template/package.json

@@ -11,7 +11,7 @@
   },
   "dependencies": {
     "react": "16.13.1",
-    "react-native": "0.63.2"
+    "react-native": "0.63.3"
   },
   "devDependencies": {
     "@babel/core": "^7.8.4",