Merge pull request #40 from Workiva/version-bump-w_common-1-6-0

WP-4553 Release w_common 1.6.0

Author: todbachman-wf

pubspec.yaml

@@ -1,6 +1,6 @@
 name: w_common
 description: General utilities for Dart projects.
-version: 1.5.0
+version: 1.6.0
 author: Workiva Client Platform Team <[email protected]>
 homepage: https://www.github.com/Workiva/w_common