Update package.json

Author: mansi-square

react-native-in-app-payments-quickstart/package.json

@@ -6,6 +6,7 @@
     "android": "react-native run-android",
     "ios": "react-native run-ios",
     "start": "react-native start",
+    "lint": "eslint .",
     "build:android": "cd android && ./gradlew assembleDebug --no-daemon --console=plain -PreactNativeArchitectures=arm64-v8a",
     "build:ios": "cd ios && xcodebuild -workspace SquareInAppPaymentsExample.xcworkspace -scheme SquareInAppPaymentsExample -configuration Debug -sdk iphonesimulator CC=clang CPLUSPLUS=clang++ LD=clang LDPLUSPLUS=clang++ GCC_OPTIMIZATION_LEVEL=0 GCC_PRECOMPILE_PREFIX_HEADER=YES ASSETCATALOG_COMPILER_OPTIMIZATION=time DEBUG_INFORMATION_FORMAT=dwarf COMPILER_INDEX_STORE_ENABLE=NO"
   },