Await all script type="module" before mocha.run

[loynoir]

Tested solved #243

[loynoir]

$ git clone https://github.com/loynoir/reproduce-karmaMocha-237.mjs .
$ pnpm install
$ pnpm test
  CJS
    ✔ bar
  fastESM
    ✔ bar

SUMMARY:
✔ 2 tests completed
$ pnpm remove karma-mocha && pnpm install https://github.com/loynoir/karma-mocha && pnpm test
  CJS
    ✔ bar
  fastESM
    ✔ bar
  slowESM
    ✔ bar

SUMMARY:
✔ 3 tests completed

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[loynoir]

Changes

1. Await all script type="module" before mocha.run. If await failed, add a unit test, and throw error within.
2. Remove lib/adapter.js from gitignore, so can use npm install <repo>.
3. mocha.requireHooks now supported, load thru {type:"import", value:"/base/my/path/to/mochaHooks.mjs"}
4. Add unit test to verify mocha.requireHooks.beforeAll works.
5. Using mocha.requireHooks.afterAll to verify mocha.run run after all slow ESM modules.
6. devDependencies updated, to support requireHooks and type = 'module'

Uncaught TypeError: this[opt] is not a function

Update mocha from 3.5.3 to 9.1.3, to support rootHooks

Uncaught SyntaxError: Unexpected token 'export

Update karma from 1.7.1 to 6.3.6, to support files.type = 'module'

WARN [karma-server]: Passing raw CLI options to `new Server(config, done)` is deprecated. Use `parseConfig(c
onfigFilePath, cliOptions, {promiseConfig: true, throwErrors: true})` to prepare a processed `Config` instance and pass that as the 
`config` argument instead.

Update grunt-karma from 2.0.0 to 4.0.2, to get rid of warning.

6. README.md updated for requireHooks

Fixme/todo:

1. import(), reported SyntaxError by low version eslint
2. Remove importSync() and importSyncFallback() when mocha accept serializable .requireHooks, or accept import() as .requireHooks input.