Update go version and linting.

.github/workflows/test.yml

@@ -3,7 +3,7 @@ name: Test
 on: [push, pull_request]
 
 env:
-  GO_VERSION: 1.18.1
+  GO_VERSION: 1.20
 
 jobs:
 
@@ -15,6 +15,7 @@ jobs:
     - uses: actions/setup-go@main
       with:
         go-version: '${{ env.GO_VERSION }}'
+        check-latest: true
     - name: Run gofmt
       run: test -z $(gofmt -l .) || (gofmt -d . && exit 1)
 
@@ -27,9 +28,10 @@ jobs:
       - uses: actions/setup-go@main
         with:
           go-version: '${{ env.GO_VERSION }}'
+          check-latest: true
       - name: Run golangci-lint
         run: |
-          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.45.2
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.51.1
           golangci-lint run -v ./...
 
   test:
@@ -41,6 +43,7 @@ jobs:
     - uses: actions/setup-go@main
       with:
         go-version: '${{ env.GO_VERSION }}'
+        check-latest: true
     - name: Run go test
       run: go test -race ./...
 
@@ -53,6 +56,7 @@ jobs:
     - uses: actions/setup-go@main
       with:
         go-version: '${{ env.GO_VERSION }}'
+        check-latest: true
     - name: Run go build
       run: |
         go build ./cli/battlesnake