feat: switch pipeline to go 1.20

Author: bahkauv70

.github/workflows/ci.yaml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        go-version: ["1.18", "1.19", "1.20", "1.21", "1.22", "1.23"]
+        go-version: ["1.20", "1.21", "1.22", "1.23"]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout

README.md

@@ -15,7 +15,7 @@ The usage of the SDK is shown in some [examples](https://github.com/stackitcloud
 
 ## Getting started
 
-Requires `Go 1.18` or higher.
+Requires `Go 1.20` or higher.
 
 To download the `core` module:
 

golang-ci.yaml

@@ -93,4 +93,4 @@ linters:
     - unparam # false positives
 issues:
   exclude-use-default: false
-go: 1.18
+go: 1.20