ci: Test on Go 1.20

Author: polyfloyd

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-go@v3
       with:
-        go-version: '1.19'
+        go-version: '1.20'
 
     - name: Get dependencies
       run: go get -v -t -d ./...