Merge pull request #48 from Workiva/release_state_machine_2.0.3

WP-5169 Release state_machine 2.0.3

Author: rmconsole2-wf

pubspec.yaml

@@ -1,5 +1,5 @@
 name: state_machine
-version: 2.0.2
+version: 2.0.3
 description: Finite state machine library. Easily define legal state transitions. Listen to state entrances, departures, and transitions.
 authors:
   - Workiva Client Platform Team <clientplatform@workiva.com>