switch to Go 1.21 for CI and docker images

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

.github/workflows/development.yml

@@ -11,11 +11,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        go: ['1.20']
+        go: ['1.21']
         os: [ubuntu-latest, macos-latest]
         upload-coverage: [true]
         include:
-          - go: '1.20'
+          - go: '1.21'
             os: windows-latest
             upload-coverage: false
 
@@ -232,7 +232,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.21'
 
       - name: Build
         run: |
@@ -296,7 +296,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.21'
 
       - name: Build
         run: |
@@ -517,7 +517,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.21'
       - uses: actions/checkout@v3
       - name: Run golangci-lint
         uses: golangci/golangci-lint-action@v3

.github/workflows/release.yml

@@ -5,7 +5,7 @@ on:
     tags: 'v*'
 
 env:
-  GO_VERSION: 1.20.12
+  GO_VERSION: 1.21.10
 
 jobs:
   prepare-sources-with-deps: