Create coveralls.yml

Author: manticore-projects

.github/workflows/coveralls.yml

@@ -0,0 +1,13 @@
+on: ["push", "pull_request"]
+
+name: Test Coveralls
+
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Coveralls GitHub Action
+      uses: coverallsapp/github-action@v1