Moved the stuff in `test/setup-babel` into `test/setup` and then removed some cruft in the `test:*` scripts of each package referencing `test/setup-babel`
- add `jsconfig.json` for the TS language server to understand the project
- update `.wallaby.js` to transpile fixtures if necessary; run on save to reduce lag
- update single-file Mocha debug launch config
- add `test` env in `babel.config.json` which is used by the former
- add some handy vscode tasks
- add a bunch of types
- remove unused `babel-eslint` (we use `@babel/eslint-parser`)
- bump `ecmaVersion` in `eslint-config-appium`
- remove cruft from babel configs (`shippedProposals: true` goes a long way)
- enable `sinon-chai` globally in tests
- add `rewiremock` for module-level mocking (sinon cannot do this itself, but they work in tandem)
This PR makes `chai` and `should()` _globals_ when using Mocha:
- `chai` is configured with `chai-as-promised`
- A `.mocharc.js` requires `./test/setup.js` _from the monorepo root_.
- Updated the ESLint config to recognize the globals.
- Updated Wallaby config
All instances of `import chai...` and the like have been removed from all test files.
Christopher Hiller