.github/test.yml: Only test for supported Go versions (#10)

* .github/test.yml: Only test for supported Go versions

* Update test.yml

* Update test.yml

* Update test.yml

* Update test.yml

.github/workflows/test.yml

@@ -4,15 +4,15 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: [1.13.x, 1.14.x, 1.15.x]
+        go-version: [oldstable, stable]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Setup Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go-version }}
       - name: go vet