unit tests: remove Go 1.14

Author: armsnyder

.github/workflows/unit-tests.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: [1.14, 1.15, 1.16]
+        go: [1.15, 1.16]
         os: [ubuntu-latest, macos-latest, windows-latest]
         make_target: [test, vet]