build: ensure compatibility for all supported Go versions

.github/workflows/ci.yml

@@ -1,13 +1,17 @@
 on: [push, pull_request]
 name: Continuous integration
+
+permissions:
+  contents: read
+
 jobs:
   validate:
     name: validate
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Lint code
         uses: golangci/golangci-lint-action@v2
       - name: Check license
@@ -16,16 +20,18 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.18.x]
+        go-version: ['1.17', '1.18', '>=1.19.0-rc.2']
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     timeout-minutes: 5
     steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
     - name: Install Go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
         go-version: ${{ matrix.go-version }}
-    - name: Checkout code
-      uses: actions/checkout@v2
+        check-latest: true
+        cache: true
     - name: Test
       run: go test ./...

go.mod

@@ -1,6 +1,6 @@
 module github.com/compose-spec/compose-go
 
-go 1.18
+go 1.17
 
 require (
 	github.com/distribution/distribution/v3 v3.0.0-20220725133111-4bf3547399eb