refactor: dart format

Author: jeremyko

example/lib/main.dart

@@ -39,7 +39,8 @@ class _MyAppState extends State<MyApp> {
     // You only need to make this call if you want to turn off the screen.
     // Add below permission in your AndroidManifest.xml file.
     //     <uses-permission android:name="android.permission.WAKE_LOCK"/>
-    await ProximitySensor.setProximityScreenOff(true).onError((error, stackTrace) {
+    await ProximitySensor.setProximityScreenOff(true)
+        .onError((error, stackTrace) {
       if (foundation.kDebugMode) {
         debugPrint("could not enable screen off functionality");
       }

lib/proximity_sensor.dart

@@ -6,7 +6,8 @@ import 'dart:io' show Platform;
 ////////////////////////////////////////////////////////////////////////////////
 class ProximitySensor {
   static EventChannel _streamChannel = EventChannel('proximity_sensor');
-  static MethodChannel _methodChannel = MethodChannel('proximity_sensor_enable');
+  static MethodChannel _methodChannel =
+      MethodChannel('proximity_sensor_enable');
 
   // for ios and android only
   static Stream<int> get events {
@@ -22,7 +23,8 @@ class ProximitySensor {
   // for android only
   static Future<void> setProximityScreenOff(bool enabled) async {
     if (!foundation.kIsWeb && Platform.isAndroid) {
-      await _methodChannel.invokeMethod<void>('enableProximityScreenOff', <String, dynamic>{
+      await _methodChannel
+          .invokeMethod<void>('enableProximityScreenOff', <String, dynamic>{
         'enabled': enabled,
       });
     }

pubspec.yaml

@@ -1,6 +1,6 @@
 name: proximity_sensor
 description: simple and easy to use flutter plugin package for proximity sensor (only)
-version: 1.3.7
+version: 1.3.8
 homepage: https://github.com/jeremyko/flutter-proximity-sensor-plugin
 
 environment: