github workflow: run tests against go1.19, go1.20

Author: prashanthpai

.github/workflows/test.yml

@@ -4,7 +4,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.13.x, 1.14.x]
+        go-version: [1.19.x, 1.20.x]
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
@@ -23,7 +23,7 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@v2
       with:
-        go-version: 1.14.x
+        go-version: 1.20.x
     - name: Checkout code
       uses: actions/checkout@v2
     - name: Run unit tests with coverage