use add-path for adding $GOPATH/bin to $PATH

.github/workflows/ci.yaml

@@ -15,10 +15,9 @@ jobs:
       uses: actions/setup-go@v1
       with:
         go-version: 1.x
+    - name: Add $GOPATH/bin to $PATH
+      run: echo "::add-path::$(go env GOPATH)/bin"
     - name: Test
       run: make test
     - name: Lint
-      run: |
-        export PATH=$PATH:$(go env GOPATH)/bin # will be removed
-        make lint
-      if: matrix.os != 'windows-latest'
+      run: make lint

.github/workflows/release.yaml

@@ -16,10 +16,10 @@ jobs:
       uses: actions/setup-go@v1
       with:
         go-version: 1.x
+    - name: Add $GOPATH/bin to $PATH
+      run: echo "::add-path::$(go env GOPATH)/bin"
     - name: Cross build
-      run: |
-        export PATH=$PATH:$(go env GOPATH)/bin # remove when actions/setup-go does this
-        make cross
+      run: make cross
     - name: Create Release
       id: create_release
       uses: actions/create-release@master
@@ -29,8 +29,6 @@ jobs:
         tag_name: ${{ github.ref }}
         release_name: Release ${{ github.ref }}
     - name: Upload
-      run: |
-        export PATH=$PATH:$(go env GOPATH)/bin # remove when actions/setup-go does this
-        make upload
+      run: make upload
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}