Merge pull request #64 from palfrey/ci

Add Github action to run tests

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+on: 
+  push:
+  pull_request:
+
+name: Continuous integration
+
+jobs:
+  test:
+    name: Test suite
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/[email protected]
+      - name: Install capnproto
+        run: sudo apt-get install capnproto libcapnp-dev
+      - uses: actions-rs/[email protected]
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - uses: Swatinem/rust-cache@v1
+      - name: Build and test
+        uses: actions-rs/[email protected]
+        with:
+          command: test