Moved to minimal Go Version 1.17

Moved to minimal Go Version 1.17 to adapt with latest build tools

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.20.1
+          go-version: 1.21.1
 
       - name: Checkout code
         uses: actions/checkout@v4
@@ -44,7 +44,7 @@ jobs:
     name: Test
     strategy:
       matrix:
-        go-version: [ 1.13.0, 1.14.0, 1.15.0 ]
+        go-version: [ 1.17.0, 1.20.0, 1.21.0 ]
         os: [ ubuntu-latest, macos-latest, windows-latest ]
     runs-on: ${{ matrix.os }}
     steps:
@@ -65,9 +65,7 @@ jobs:
             ${{ runner.os }}-go-
 
       - name: Install goveralls
-        env:
-          GO111MODULE: off
-        run: go get github.com/mattn/goveralls
+        run: go install github.com/mattn/goveralls@latest
 
       - name: Test
         run: |
@@ -109,7 +107,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.20.1
+          go-version: 1.21.1
 
       - name: Cache
         uses: actions/cache@v3

go.mod

@@ -1,3 +1,3 @@
 module github.com/echocat/slf4g
 
-go 1.13
+go 1.17

native/go.mod

@@ -1,6 +1,6 @@
 module github.com/echocat/slf4g/native
 
-go 1.13
+go 1.17
 
 replace github.com/echocat/slf4g => ../