Bump golang to 1.20.0 (#6070)

Signed-off-by: Ayato Tokubi <atokubi@redhat.com>

.github/workflows/go.coverage.yml

@@ -11,7 +11,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@4d34df0c2316fe8122ab82dc22947d607c0c91f9
         with:
-          go-version: '1.19.0'
+          go-version: '1.20.0'
         id: go
 
       - name: Check out code

.github/workflows/go.test.yml

@@ -11,7 +11,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@4d34df0c2316fe8122ab82dc22947d607c0c91f9
         with:
-          go-version: '1.19.0'
+          go-version: '1.20.0'
         id: go
 
       - name: Check out code
@@ -33,7 +33,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@4d34df0c2316fe8122ab82dc22947d607c0c91f9
         with:
-          go-version: '1.19.0'
+          go-version: '1.20.0'
         id: go
 
       - name: Check out code
@@ -52,7 +52,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@4d34df0c2316fe8122ab82dc22947d607c0c91f9
         with:
-          go-version: '1.19.0'
+          go-version: '1.20.0'
         id: go
 
       - name: Check out code

.github/workflows/golangci-lint.yml

@@ -8,9 +8,9 @@ jobs:
     steps:
       - uses: actions/setup-go@4d34df0c2316fe8122ab82dc22947d607c0c91f9
         with:
-          go-version: '1.19.0'
+          go-version: '1.20.0'
       - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3.4.0
         with:
-          version: v1.49.0
+          version: v1.52.2

.github/workflows/make.doc.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@4d34df0c2316fe8122ab82dc22947d607c0c91f9
         with:
-          go-version: '1.19.0'
+          go-version: '1.20.0'
 
       - name: Update Docs
         run: |

README.md

@@ -53,7 +53,7 @@ out-of-tree plugins.
 To compile CoreDNS, we assume you have a working Go setup. See various tutorials if you don’t have
 that already configured.
 
-First, make sure your golang version is 1.17 or higher as `go mod` support and other api is needed.
+First, make sure your golang version is 1.20 or higher as `go mod` support and other api is needed.
 See [here](https://github.com/golang/go/wiki/Modules) for `go mod` details.
 Then, check out the project and run `make` to compile the binary:
 
@@ -71,7 +71,7 @@ CoreDNS requires Go to compile. However, if you already have docker installed an
 setup a Go environment, you could build CoreDNS easily:
 
 ```
-$ docker run --rm -i -t -v $PWD:/v -w /v golang:1.18 make
+$ docker run --rm -i -t -v $PWD:/v -w /v golang:1.20 make
 ```
 
 The above command alone will have `coredns` binary generated.

go.mod

@@ -1,6 +1,6 @@
 module github.com/coredns/coredns
 
-go 1.18
+go 1.20
 
 require (
 	github.com/Azure/azure-sdk-for-go v68.0.0+incompatible

plugin/auto/xfr.go

@@ -28,4 +28,4 @@ func (a Auto) Notify() error {
 		}
 	}
 	return err
-}
+}