Upgrade test dependencies

- Upgrade Python to 3.9 now that cffi provides musllinux packages
- Upgrade Selenium standalone Chrome to 4.8.1 for newer ESM support
- Run tests in verbose mode and update one Selenium import
- Update find_elements?_by_.*(...) calls to find_elements?(By..., ...)
  since SeleniumHQ/selenium#10712
- Close driver during teardown even when there is no result outcome, to
  avoid keeping connections open for too long
- Add remote connection timeout to detect connection issues earlier per
  SeleniumHQ/selenium#11596
- Remove some Python 2 import attempt
- Axe report: Do not exit out if file does not exist
- Adjust move_to_element_with_offset calls to work in center element,
  based on SeleniumHQ/selenium#11402
- Quit driver and set to None at teardown. This should properly close
  the session, allowing the connection to be reused for another test.
- Update browser-sync

package.json

@@ -8,7 +8,7 @@
     "production": "cross-env NODE_ENV=production webpack --config=node_modules/laravel-mix/setup/webpack.config.js",
     "test": "./run-test.sh",
     "nyc-report": "cross-env NODE_ENV=test nyc report --temp-dir test/coverage/output --reporter lcov --report-dir test/coverage",
-    "axe-report": "cross-env NODE_ENV=test node axe-report.js && tr '\\r' '\\n' < test/accessibility/report.txt.csv > test/accessibility/report.csv"
+    "axe-report": "cross-env NODE_ENV=test node axe-report.js && [ -f test/accessibility/report.txt.csv ] && tr '\\r' '\\n' < test/accessibility/report.txt.csv > test/accessibility/report.csv || exit 0"
   },
   "devDependencies": {
     "@ictu/axe-reports": "^1.1.11",
@@ -17,7 +17,7 @@
     "babel-loader": "^9.1.2",
     "babel-plugin-istanbul": "^6.1.1",
     "babel-preset-env": "^1.7.0",
-    "browser-sync": "^2.27.12",
+    "browser-sync": "^2.28.1",
     "browser-sync-webpack-plugin": "^2.3.0",
     "express": "^4.18.2",
     "html-webpack-plugin": "^5.5.0",

run-test.sh

@@ -202,7 +202,7 @@ for name in $VISUALIZATION_NAMES; do
 done
 echo "Starting test"
 
-docker exec -u `id -u`:`id -g` $TEST_CONTAINER python /work/test.py
+docker exec -u `id -u`:`id -g` $TEST_CONTAINER python /work/test.py -v
 status=$?
 
 container_logs