Updated Podspec to v6.2.0

Author: Reid Main

iOSSnapshotTestCase.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
   s.name         = "iOSSnapshotTestCase"
   s.module_name  = "FBSnapshotTestCase"
-  s.version      = "6.1.0"
+  s.version      = "6.2.0"
   s.summary      = "Snapshot view unit tests for iOS"
   s.description  = <<-DESC
                     A "snapshot test case" takes a configured UIView or CALayer