Add go versions 1.19 1.20 1.21 1.22 (#228)

* Add go versions 1.19 1.20 1.21 1.22
* Ignore the apns2 cli in coverage tests

Author: sideshow

.github/workflows/tests.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: [1.16.x, 1.17.x, 1.18.x]
+        go: [1.16.x, 1.17.x, 1.18.x, 1.19.x, 1.20.x, 1.21.x, 1.22.x]
     steps:
       - uses: actions/checkout@v2
 
@@ -33,4 +33,4 @@ jobs:
       - name: Update coverage
         env:
           COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: goveralls -coverprofile=covprofile -service=github
+        run: goveralls -ignore=apns2/main.go -coverprofile=covprofile -service=github