test matrix add go1.14 (#1551)

test matrix deprecate go1.11

Author: alrs

.github/workflows/echo.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        go: [1.11, 1.12, 1.13]
+        go: [1.12, 1.13, 1.14]
     name: ${{ matrix.os }} @ Go ${{ matrix.go }}
     runs-on: ${{ matrix.os }}
     steps: