ci: add coveralls (#1956)

.github/workflows/go.yml

@@ -66,6 +66,13 @@ jobs:
         ./bin/deepsource report --analyzer test-coverage --key go --value-file ./cover.out
       env:
         DEEPSOURCE_DSN: ${{ secrets.DEEPSOURCE_DSN }}
+    - name: Coveralls
+      if: matrix.os == 'ubuntu-latest'
+      uses: shogo82148/actions-goveralls@v1
+      with:
+        path-to-profile: cover.out
+      env:
+        COVERALLS_TOKEN: ${{ secrets.COVERALLS_TOKEN }}
     - name: Trigger Beekeeper
       if: github.ref == 'refs/heads/master' && matrix.os == 'ubuntu-latest' && success()
       uses: peter-evans/repository-dispatch@v1

README.md

@@ -2,6 +2,7 @@
 
 [![Go](https://github.com/ethersphere/bee/workflows/Go/badge.svg)](https://github.com/ethersphere/bee/actions)
 [![Go Reference](https://pkg.go.dev/badge/github.com/ethersphere/bee.svg)](https://pkg.go.dev/github.com/ethersphere/bee)
+[![Coverage Status](https://coveralls.io/repos/github/ethersphere/bee/badge.svg)](https://coveralls.io/github/ethersphere/bee)
 
 ```
 Welcome to the Swarm.... Bzzz Bzzzz Bzzzz