drop older go versions

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go: ['1.21', '1.22', '1.23', '1.24']
+        go: ['1.23', '1.24']
     name: Go ${{ matrix.go }} test
     steps:
       - uses: actions/checkout@v4

README.md

@@ -156,9 +156,7 @@ Versions that also build are marked with :warning:.
 
 | Version | Supported          |
 | ------- | ------------------ |
-| <1.21   | :x:                |
-| 1.21    | :warning:          |
-| 1.22    | :white_check_mark: |
+| <1.23   | :x:                |
 | 1.23    | :white_check_mark: |
 | 1.24    | :white_check_mark: |
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/zitadel/oidc/v3
 
-go 1.24
+go 1.23.7
 
 require (
 	github.com/bmatcuk/doublestar/v4 v4.8.1