Support golang 1.20.x

Author: limingxinleo

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
     name: Test for Golang ${{ matrix.go-version }} on ${{ matrix.platform }}
     strategy:
       matrix:
-        go-version: [ 1.18.x, 1.19.x ]
+        go-version: [ 1.18.x, 1.19.x, 1.20.x ]
         platform: [ ubuntu-latest ]
     runs-on: ${{ matrix.platform }}
     steps: