Updated forked version of Heimdallr

Version 3.7 up on github but not available through cocoapods seen here
trivago#123 from Aug 2nd.

We will push out a release under ToznyHeimdallr so we can take advantage
of the updated dependencies for Swift 5.

Heimdallr.podspec → ToznyHeimdallr.podspec

@@ -1,24 +1,24 @@
 Pod::Spec.new do |spec|
-  spec.name = 'Heimdallr'
-  spec.version = '3.7.0'
+  spec.name = 'ToznyHeimdallr'
+  spec.version = '4.0.0'
   spec.authors = {
     'trivago' => '[email protected]'
   }
-  spec.social_media_url = 'https://twitter.com/trivago'
   spec.license = {
     :type => 'Apache License, Version 2.0',
     :file => 'LICENSE'
   }
-  spec.homepage = 'https://github.com/trivago/Heimdallr.swift'
+  spec.homepage = 'https://github.com/tozny/Heimdallr.swift'
   spec.source = {
-    :git => 'https://github.com/trivago/Heimdallr.swift.git',
+    :git => 'https://github.com/tozny/Heimdallr.swift.git',
     :tag => spec.version.to_s
   }
   spec.summary = 'Easy to use OAuth 2 library, written in Swift'
   spec.description = 'Heimdallr is an OAuth 2.0 client specifically designed for easy usage. It currently supports the resource owner password credentials grant flow, refreshing an access token as well as extension grants.'
 
   spec.ios.deployment_target = '9.0'
   spec.osx.deployment_target = '10.10'
+  spec.swift_version = '5.0'
 
   spec.default_subspec = 'Core'