ci: test with Go 1.19

Author: dunglas

.github/workflows/ci.yaml

@@ -28,7 +28,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v2
       with:
-        go-version: '1.15'
+        go-version: '1.19'
     - name: Install project dependencies
       run: go get
     - name: Test