ci: migrate from zuul to webdriver.io

zuul is now archived [1] and does not support the new W3C WebDriver
protocol, since it relies on the wd package [2] under the hood, which
uses the (now deprecated) JSON Wire Protocol.

We will now use the webdriver.io test framework, which allows to run
our tests in local and on Sauce Labs (cross-browser and mobile tests).
This allows us to run our tests on latest versions of Android and iOS,
since Sauce Labs only supports the W3C WebDriver protocol for these
platforms ([3]).

[1]: https://github.com/defunctzombie/zuul
[2]: https://github.com/admc/wd
[3]: https://docs.saucelabs.com/dev/w3c-webdriver-capabilities/

.github/workflows/ci.yml

@@ -6,40 +6,51 @@ on:
   schedule:
     - cron: '0 0 * * 0'
 
+permissions:
+  contents: read
+
 jobs:
   test-node:
     runs-on: ubuntu-latest
+    timeout-minutes: 10
 
     strategy:
       matrix:
         node-version: [14, 16]
 
     steps:
-      - uses: actions/checkout@v3
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}
-      - run: npm ci
-      - run: npm test
-        env:
-          CI: true
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test
 
   test-browser:
     runs-on: ubuntu-latest
+    timeout-minutes: 10
 
     steps:
-      - uses: actions/checkout@v3
-      - name: Use Node.js
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Use Node.js 16
         uses: actions/setup-node@v3
         with:
-          node-version: '10.x'
-      - run: npm ci
+          node-version: 16
+
+      - name: Install dependencies
+        run: npm ci
+
       - run: npm test
         env:
-          CI: true
           BROWSERS: 1
-          NGROK_AUTH_TOKEN: ${{ secrets.NGROK_AUTH_TOKEN }}
           SAUCE_USERNAME: ${{ secrets.SAUCE_USERNAME }}
           SAUCE_ACCESS_KEY: ${{ secrets.SAUCE_ACCESS_KEY }}
-        timeout-minutes: 20

babel.config.js

@@ -0,0 +1,3 @@
+module.exports = {
+  presets: [["@babel/preset-env"]],
+};