Add continuous integration tests

Author: BramBonne

.github/workflows/ci.yaml

@@ -0,0 +1,18 @@
+name: Continuous integration
+
+on: [push, pull_request]
+
+jobs:
+  run-tests:
+    name: Run tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test