Test on oldest supported SDK on Travis (#257)

kevmoo · web-flow · commit 0c00db0f2861 · 2019-03-13T08:51:17.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,7 +2,7 @@ language: dart
 
 dart:
   - dev
-  - stable
+  - 2.0.0
 
 dart_task:
   - test: --platform vm
