Bump GSI version to 6.2.0. (#110)

GoogleSignIn.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'GoogleSignIn'
-  s.version          = '6.1.0'
+  s.version          = '6.2.0'
   s.summary          = 'Enables iOS apps to sign in with Google.'
   s.description      = <<-DESC
 The Google Sign-In SDK allows users to sign in with their Google account from third-party apps.

Package.swift

@@ -17,7 +17,7 @@
 
 import PackageDescription
 
-let googleSignInVersion = "6.1.0"
+let googleSignInVersion = "6.2.0"
 
 let package = Package(
   name: "GoogleSignIn",