Merge pull request #149 from DirectMyFile/maint1

update changelog, version to 5.0.1

Author: robbecker-wf

CHANGELOG.md

@@ -1,3 +1,7 @@
+## v5.0.1
+  - Fixed a runtime exception (https://github.com/DirectMyFile/github.dart/issues/139)
+  - Added an optional `base` argument when editing a PR (https://github.com/DirectMyFile/github.dart/pull/145)
+
 ## v5.0.0
 
 - **BREAKING** `RepositoriesService.listCollaborators` now returns 

pubspec.yaml

@@ -1,5 +1,5 @@
 name: github
-version: 5.0.0
+version: 5.0.1
 author: Kenneth Endfinger <[email protected]>
 description: GitHub API Client Library
 homepage: https://github.com/DirectMyFile/github.dart