ci: add a bit of Github workflows (#189)

Might as well do it, as I also just pushed first and tested later.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

.github/workflows/build.yml

@@ -0,0 +1,13 @@
+name: Build & run tests
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Run the 'make test'
+      run: make test