build: set minimal Go version to 1.22

Add 1.23 and 1.24 to CI test matrix.

Fixes: #18

Author: piraz

.github/workflows/run_tests.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: ["1.20", "1.21", "1.22"]
+        go-version: ["1.22", "1.23", "1.24"]
 
     steps:
       - uses: actions/checkout@v4

go.mod

@@ -1,6 +1,6 @@
 module github.com/candango/httpok
 
-go 1.20
+go 1.22
 
 require (
 	github.com/go-kit/log v0.2.0