Upgrade Go to 1.20 (#131)

Co-authored-by: Oliver Geiselhardt-Herms <[email protected]>

Author: takt

.github/workflows/go.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@v2
       with:
-        go-version: ^1.14
+        go-version: ^1.20
 
     - name: Check out code into the Go module directory
       uses: actions/checkout@v2