[firebase_auth] use long datatype for timestamps (iOS) (#1973)

* [firebase_auth] use long datatype for timestamps (iOS)
diff --git a/packages/firebase_auth/CHANGELOG.md b/packages/firebase_auth/CHANGELOG.md
index 1565e4f..d2b0aa1 100644
--- a/packages/firebase_auth/CHANGELOG.md
+++ b/packages/firebase_auth/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.14.0+2
+
+* Reduce compiler warnings on iOS port by replacing `int` with `long` backing in returned timestamps.
+
 ## 0.14.0+1
 
 * Add dependency on `androidx.annotation:annotation:1.0.0`.
diff --git a/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m b/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m
index 682ffe1..28a3f3e 100644
--- a/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m
+++ b/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m
@@ -217,9 +217,10 @@
                                 tokenData = [[NSMutableDictionary alloc] initWithDictionary:@{
                                   @"token" : tokenResult.token,
                                   @"expirationTimestamp" :
-                                      [NSNumber numberWithInt:expirationTimestamp],
-                                  @"authTimestamp" : [NSNumber numberWithInt:authTimestamp],
-                                  @"issuedAtTimestamp" : [NSNumber numberWithInt:issuedAtTimestamp],
+                                      [NSNumber numberWithLong:expirationTimestamp],
+                                  @"authTimestamp" : [NSNumber numberWithLong:authTimestamp],
+                                  @"issuedAtTimestamp" :
+                                      [NSNumber numberWithLong:issuedAtTimestamp],
                                   @"claims" : tokenResult.claims,
                                 }];
 
diff --git a/packages/firebase_auth/pubspec.yaml b/packages/firebase_auth/pubspec.yaml
index d4cf41b..163957b 100755
--- a/packages/firebase_auth/pubspec.yaml
+++ b/packages/firebase_auth/pubspec.yaml
@@ -4,7 +4,7 @@
   like Google, Facebook and Twitter.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/firebase_auth
-version: 0.14.0+1
+version: 0.14.0+2
 
 flutter:
   plugin: