Configure CI through GitHub Actions

[Closes #10]

.github/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: CI
+on:
+  pull_request:
+  push:
+    branches:
+    - master
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        image:
+        - rust:latest
+        - rustlang/rust:nightly
+    runs-on: ubuntu-latest
+    container:
+      image: ${{ matrix.image }}
+    steps:
+    - uses: actions/checkout@v1
+    - name: Test
+      run: ./scripts/test.sh
+  lint:
+    strategy:
+      fail-fast: false
+      matrix:
+        image:
+        - rust:latest
+        - rustlang/rust:nightly
+    runs-on: ubuntu-latest
+    container:
+      image: ${{ matrix.image }}
+    steps:
+    - uses: actions/checkout@v1
+    - name: Lint
+      run: ./scripts/lint.sh

scripts/lint.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -eu
+
+if rustup component add clippy; then
+  cargo clippy --all-targets --all -- \
+    `# Exit with a nonzero code if there are clippy warnings` \
+    -Dwarnings \
+    "$@"
+fi

scripts/test.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -eu
+
+cargo test --all "$@"