Merge pull request #66 from Workiva/batch/fedx/test_dart_218

Test Dart 2.18

Author: rmconsole3-wf

.github/workflows/dart_ci.yaml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        sdk: [ stable, beta, dev ]
+        sdk: [ stable, beta ]
     steps:
       - uses: actions/checkout@v2
       - uses: dart-lang/setup-dart@v1