Make Go 1.23 as min required version

Author: amalfra

.github/workflows/publish.yml

@@ -9,7 +9,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.20.x
+          go-version: 1.23.x
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Get tag

.github/workflows/test.yml

@@ -4,7 +4,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.18.x, 1.19.x, 1.20.x]
+        go-version: [1.23.x, 1.24.x]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:

go.mod

@@ -1,3 +1,3 @@
 module github.com/amalfra/oexec/v3
 
-go 1.18
+go 1.23.0