build(ci): test matrix include go1.12 up to go1.18 (#30)

* build(ci): test matrix include go1.12 up to go1.18

This tests back from the version specified in go.mod to current stable.
This should enable detection of any breaking version changes as part of
the dependencies update PR.

subtask forked from #28.

* build(ci): disable fail-fast to test all go versions

* build(ci): bump version of golangci-lint to v1.45.2

.github/workflows/ci.yml

@@ -6,21 +6,22 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.15', '1.14' ]
+        go: [ '1.18', '1.17', '1.16', '1.15', '1.14', '1.13', '1.12' ]
+      fail-fast: false
     name: Go ${{ matrix.go }} test
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
       - name: Install Go stable version
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v3
         with:
           go-version: ${{ matrix.go }}
       - name: Install GolangCI-Lint
-        run: curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.25.0
+        run: curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.45.2
       - name: Test with coverage
         run: make cover
       - name: Upload code coverage to codecov
-        if: matrix.go == '1.15'
+        if: matrix.go == '1.18'
         uses: codecov/codecov-action@v1
         with:
           file: ./coverage.out