[firebase_auth] Make providerId 'const String' for easier use in switch statements (#1292)

* Make providerId 'const String' to use in "case"

Author: dotdoom

packages/firebase_auth/CHANGELOG.md

@@ -1,10 +1,14 @@
+## 0.8.3
+
+* Make providerId 'const String' to use in 'case' statement.
+
 ## 0.8.2+1
 
-* Fixed bug where `PhoneCodeAutoRetrievalTimeout` callback was never called.g
+* Fixed bug where `PhoneCodeAutoRetrievalTimeout` callback was never called.
 
 ## 0.8.2
 
- * Fixed `linkWithCredential` on Android.
+* Fixed `linkWithCredential` on Android.
 
 ## 0.8.1+5
 

packages/firebase_auth/lib/src/auth_provider/email_auth_provider.dart

@@ -5,7 +5,7 @@
 part of firebase_auth;
 
 class EmailAuthProvider {
-  static final String providerId = 'password';
+  static const String providerId = 'password';
 
   static AuthCredential getCredential({
     String email,

packages/firebase_auth/lib/src/auth_provider/facebook_auth_provider.dart

@@ -5,7 +5,7 @@
 part of firebase_auth;
 
 class FacebookAuthProvider {
-  static final String providerId = 'facebook.com';
+  static const String providerId = 'facebook.com';
 
   static AuthCredential getCredential({String accessToken}) {
     return AuthCredential._(

packages/firebase_auth/lib/src/auth_provider/github_auth_provider.dart

@@ -5,7 +5,7 @@
 part of firebase_auth;
 
 class GithubAuthProvider {
-  static final String providerId = 'github.com';
+  static const String providerId = 'github.com';
 
   static AuthCredential getCredential({@required String token}) {
     return AuthCredential._(providerId, <String, String>{'token': token});

packages/firebase_auth/lib/src/auth_provider/google_auth_provider.dart

@@ -5,7 +5,7 @@
 part of firebase_auth;
 
 class GoogleAuthProvider {
-  static final String providerId = 'google.com';
+  static const String providerId = 'google.com';
 
   static AuthCredential getCredential({
     @required String idToken,

packages/firebase_auth/lib/src/auth_provider/phone_auth_provider.dart

@@ -5,7 +5,7 @@
 part of firebase_auth;
 
 class PhoneAuthProvider {
-  static final String providerId = 'phone';
+  static const String providerId = 'phone';
 
   static AuthCredential getCredential({
     @required String verificationId,

packages/firebase_auth/lib/src/auth_provider/twitter_auth_provider.dart

@@ -5,7 +5,7 @@
 part of firebase_auth;
 
 class TwitterAuthProvider {
-  static final String providerId = 'twitter.com';
+  static const String providerId = 'twitter.com';
 
   static AuthCredential getCredential({
     @required String authToken,

packages/firebase_auth/pubspec.yaml

@@ -4,7 +4,7 @@ description: Flutter plugin for Firebase Auth, enabling Android and iOS
   like Google, Facebook and Twitter.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/firebase_auth
-version: 0.8.2+1
+version: "0.8.3"
 
 flutter:
   plugin: