CI to test in 1.21 and 1.22

Not updating Go version in go.mod since we don't need any new functionalities.

Author: rabbbit

.github/workflows/test.yaml

@@ -16,9 +16,9 @@ jobs:
 
     strategy:
       matrix:
-        go: ["1.19.x", "1.20.x"]
+        go: ["1.21.x", "1.22.x"]
         include:
-        - go: 1.20.x
+        - go: 1.22.x
           latest: true
 
     steps: