Activate github actions

Author: Pascal Grange

.github/workflows/bash_unit.yml

@@ -0,0 +1,11 @@
+name: bash_unit CI
+on:
+  push:
+
+jobs:
+  ubuntu:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Unit testing with bash_unit
+      run: FORCE_COLOR=true ./bash_unit tests/test*