Fixed link error on iOS example app, due to a newer GoogleUtilities lib which is incompatible with the configured Firebase libs

Locked GoogleUtilities down to a specific version

Author: IjzerenHein

example/ios/Podfile

@@ -5,6 +5,14 @@ target 'ReactNativeFirebaseUIExample' do
   # Uncomment the next line if you're using Swift or would like to use dynamic frameworks
   # use_frameworks!
 
+  # The following line hard selects GoogleUtilities 5.3.7
+  # This line should probably be removed in the future but
+  # fixes a linker problem on iOS, due to the fact that if
+  # we ommit this line, then 5.4.0 gets installed, which
+  # causes a link error.
+  pod 'GoogleUtilities', '~> 5.3.7'
+
+
   # Pods for ReactNativeFirebaseUIExample
 
   # Required by RNFirebase

example/ios/Podfile.lock

@@ -136,6 +136,17 @@ PODS:
     - GoogleToolboxForMac/Defines (= 2.2.0)
   - "GoogleToolboxForMac/NSData+zlib (2.2.0)":
     - GoogleToolboxForMac/Defines (= 2.2.0)
+  - GoogleUtilities (5.3.7):
+    - GoogleUtilities/AppDelegateSwizzler (= 5.3.7)
+    - GoogleUtilities/Environment (= 5.3.7)
+    - GoogleUtilities/ISASwizzler (= 5.3.7)
+    - GoogleUtilities/Logger (= 5.3.7)
+    - GoogleUtilities/MethodSwizzler (= 5.3.7)
+    - GoogleUtilities/Network (= 5.3.7)
+    - "GoogleUtilities/NSData+zlib (= 5.3.7)"
+    - GoogleUtilities/Reachability (= 5.3.7)
+    - GoogleUtilities/SwizzlerTestHelpers (= 5.3.7)
+    - GoogleUtilities/UserDefaults (= 5.3.7)
   - GoogleUtilities/AppDelegateSwizzler (5.3.7):
     - GoogleUtilities/Environment
     - GoogleUtilities/Logger
@@ -153,6 +164,7 @@ PODS:
   - "GoogleUtilities/NSData+zlib (5.3.7)"
   - GoogleUtilities/Reachability (5.3.7):
     - GoogleUtilities/Logger
+  - GoogleUtilities/SwizzlerTestHelpers (5.3.7)
   - GoogleUtilities/UserDefaults (5.3.7):
     - GoogleUtilities/Logger
   - "gRPC-C++ (0.0.5)":
@@ -197,6 +209,7 @@ DEPENDENCIES:
   - Firebase/Performance (~> 5.15.0)
   - Firebase/RemoteConfig (~> 5.15.0)
   - Firebase/Storage (~> 5.15.0)
+  - GoogleUtilities (~> 5.3.7)
   - SDWebImage (~> 4.0)
 
 SPEC REPOS:
@@ -264,6 +277,6 @@ SPEC CHECKSUMS:
   Protobuf: 7a877b7f3e5964e3fce995e2eb323dbc6831bb5a
   SDWebImage: 3f3f0c02f09798048c47a5ed0a13f17b063572d8
 
-PODFILE CHECKSUM: 17807d9c8dcf86a5c6b96ea8dc9b411fefd9d084
+PODFILE CHECKSUM: e43db4b065586235b97d91c28d5883dc5621daed
 
 COCOAPODS: 1.6.1