Use github actions instead of travis-ci

.github/workflows/unit_tests.yaml

@@ -0,0 +1,21 @@
+name: Units tests
+on: [push, pull_request]
+jobs:
+  checks:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Setup go
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.17
+    - name: Run tests
+      run: go test -v -covermode=count -coverprofile=coverage.out
+    - name: Convert coverage to lcov
+      uses: jandelgado/gcov2lcov-action@v1.0.8
+    - name: Coveralls
+      uses: coverallsapp/github-action@v1.1.2
+      with:
+        github-token: ${{ secrets.github_token }}
+        path-to-lcov: coverage.lcov