switch to go mod based goveralls in CI

Author: johnbartholomew

Diff for: .github/workflows/ci.yml

@@ -70,23 +70,23 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - run: sudo apt install python3-dev python3-setuptools
-      - run: pip install -U wheel
-      - run: pip install -U pytest setuptools
+      # - run: sudo apt install python3-dev python3-setuptools
+      # - run: pip install -U wheel
+      # - run: pip install -U pytest setuptools
       # - uses: golangci/golangci-lint-action@v2
       #   with:
       #     version: v1.30.0
       - run: make all
       - name: Install goveralls
-        env:
-          GO111MODULE: off
         run: |
-          export GOPATH=$GITHUB_WORKSPACE
-          go get github.com/mattn/goveralls
+          export GOBIN=$GITHUB_WORKSPACE/gobin
+          mkdir "$GOBIN"
+          go install github.com/mattn/[email protected]
       - name: Send coverage
         env:
           COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: ./bin/goveralls -coverprofile=coverage.out -service=github
+        run: |
+          ./gobin/goveralls -coverprofile=coverage.out -service=github
 
   goreleaser:
     name: Goreleaser