Use Github actions for CI

.github/workflows/ci.yml

@@ -0,0 +1,37 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Setup bats
+      uses: mig4/setup-bats@v1
+      with:
+        bats-version: 1.2.1
+
+    - name: Setup kcov
+      run: |-
+        sudo apt install libcurl4-openssl-dev libelf-dev libdw-dev cmake &&
+        wget https://github.com/SimonKagstrom/kcov/archive/master.tar.gz &&
+        tar xzf master.tar.gz &&
+        cd kcov-master &&
+        mkdir build &&
+        cd build &&
+        cmake .. &&
+        make &&
+        sudo make install &&
+        cd ../.. &&
+        rm -rf kcov-master
+
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - name: Test with coverage
+      run: |-
+        mkdir -p coverage &&
+        kcov coverage bats test &&
+        bash <(curl -s https://codecov.io/bash)