Update GHA test Golang targets.

.github/workflows/on-pull-request.yaml

@@ -2,37 +2,33 @@ name: CI
 
 on:
   push:
-    branches:
-      - master
-      - main
+    branches: [ master, main ]
   pull_request:
-    branches:
-      - master
-      - main
+    branches: [ master, main ]
 
 jobs:
   on-pull-request:
     name: test
     strategy:
       matrix:
         go-version:
-          - 1.18.x
-          - 1.19.x
+          - 1.22.x
+          - 1.23.x
         os: [ ubuntu-latest ]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@master
+        uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go-version }}
 
       - run: go env
 
       - name: Cache deps
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -43,4 +39,4 @@ jobs:
         run: go mod download
 
       - name: Test
-        run: go test ./...
+        run: go test ./...