Attempt to add coverage

.github/workflows/coverage

@@ -0,0 +1,37 @@
+name: Coverage
+on: [push]
+jobs:
+
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        go:
+          - '1.22'
+
+    steps:
+      - uses: actions/setup-go@v3
+        with:
+          go-version: ${{ matrix.go }}
+      - uses: actions/checkout@v3
+
+      - name: Run Coverage Profile
+        run: |
+          go test -v -coverprofile=profile.cov ./...
+
+      - name: Send coverage
+        uses: shogo82148/actions-goveralls@v1.7.0
+        with:
+          path-to-profile: profile.cov
+          flag-name: Go-${{ matrix.go }}
+          parallel: true
+
+  # notifies that all test jobs are finished.
+  finish:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: shogo82148/actions-goveralls@v1.7.0
+        with:
+          parallel-finished: true

README.md

@@ -1,5 +1,6 @@
 [![Tests Status](https://github.com/enviodev/hypersync-client-go/actions/workflows/test.yml/badge.svg)](https://github.com/enviodev/hypersync-client-go/actions/workflows/test.yml)
 [![Security Status](https://github.com/enviodev/hypersync-client-go/actions/workflows/gosec.yml/badge.svg)](https://github.com/enviodev/hypersync-client-go/actions/workflows/gosec.yml)
+[![Coverage Status](https://coveralls.io/repos/github/enviodev/hypersync-client-go/badge.svg?branch=main)](https://coveralls.io/github/enviodev/hypersync-client-go?branch=main)
 
 # HyperSync Go Client