CLDR SurveyTool JavaScript Tests

• in the 'js' directory, run npm i to install
• To rebuild, run npm run build-test
• If you want to continuously compile, keep npm run watch-test (control-C to cancel)
• open the browser console to check for errors/warnings that are otherwise invisible!

References:

• running-mocha-in-the-browser
• running-mocha-tests-as-native-es6-modules-in-a-browser