Add 1.14 tests

Author: icy

.github/workflows/tests.yaml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.13', '1.12']
+        go: [ '1.14', '1.13', '1.12']
     steps:
     - uses: actions/checkout@v2
     - name: smoke