ci: add Go 1.20 to build matrix

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>

.github/workflows/ci.yaml

@@ -23,7 +23,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.19
+          go-version: '1.20'
 
       - name: Checkout code
         uses: actions/checkout@v3
@@ -43,7 +43,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        go: ['1.17', '1.18', '1.19']
+        go: ['1.17', '1.18', '1.19', '1.20']
     env:
       GOFLAGS: -mod=readonly
 
@@ -74,7 +74,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.19
+          go-version: '1.20'
 
       - name: Checkout code
         uses: actions/checkout@v3
@@ -82,4 +82,4 @@ jobs:
       - name: Lint
         uses: golangci/golangci-lint-action@v3
         with:
-          version: v1.50.1
+          version: v1.51.1