Fix Dart 2 type error in local_auth

packages/local_auth/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.2
+
+* Fixed Dart 2 type error.
+
 ## 0.1.1
 
 * Simplified and upgraded Android project template to Android SDK 27.

packages/local_auth/android/build.gradle

@@ -34,5 +34,5 @@ android {
 }
 
 dependencies {
-    compile "com.android.support:support-v4:26.1.0"
+    implementation "com.android.support:support-v4:26.1.0"
 }

packages/local_auth/lib/local_auth.dart

@@ -53,7 +53,7 @@ class LocalAuthentication {
     bool stickyAuth: false,
     AndroidAuthMessages androidAuthStrings: const AndroidAuthMessages(),
     IOSAuthMessages iOSAuthStrings: const IOSAuthMessages(),
-  }) {
+  }) async {
     assert(localizedReason != null);
     final Map<String, Object> args = <String, Object>{
       'localizedReason': localizedReason,
@@ -71,6 +71,6 @@ class LocalAuthentication {
               'operating systems.',
           details: 'Your operating system is ${Platform.operatingSystem}');
     }
-    return _channel.invokeMethod('authenticateWithBiometrics', args);
+    return await _channel.invokeMethod('authenticateWithBiometrics', args);
   }
 }

packages/local_auth/pubspec.yaml

@@ -1,7 +1,7 @@
 name: local_auth
 description: Flutter plugin for Android and iOS device authentication sensors
   such as Fingerprint Reader and Touch ID.
-version: 0.1.1
+version: 0.1.2
 author: Flutter Team <[email protected]>
 homepage: https://github.com/flutter/plugins/tree/master/packages/local_auth