mocha-8-watcher-issue

Demonstrates issue with mocha@8 that crashes watch mode when imports fail (mochajs/mocha#4580). This is a minimal mocha setup, see typescript branch for the same issue with a ts-node setup.

To reproduce:

• npm i
• npm run test -- --watch
• watcher should run and test passes
• uncomment the RUNTIME ERROR part in test/example.test.js
• the watcher should show the error but not crash
• uncomment either the REQUIRE ERROR or EXPLICIT THROW part in test/example.test.js
• the watcher crashes
• install mocha 7 with npm i mocha@7
• npm run test -- --watch
• the watcher shows an error but does not crash