ci: bump go versions to 1.19 and 1.20

Author: vladimir-ch

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
     name: Build
     strategy:
       matrix:
-        go-version: [1.18.x, 1.17.x]
+        go-version: [1.20.x, 1.19.x]
         platform: [ubuntu-latest]
 
     runs-on: ${{ matrix.platform }}