The built version of this library that is downloaded when you run `npm
install @testing-library/react-hooks` contains a few features that are
not supported by `figbuild`. This forked version makes the following
changes:
- Output code that `figbuild` is set up to process. This was
 accomplished by adding a `.browserslistrc` file that lists IE 11 as a
 supported browser. While we don't actually support IE 11, this does
 mean the build won't try to use any fancy new language features.
- Build with the `--bundle` option. This causes the build script to use
 Rollup to generate a single script file, instead of separate ES6
 modules. This is also required to make the build script care about the
 `.browserslistrc` file.
- Update the `main` and `types` fields of `package.json`. The `--bundle`
 option places the built file in a different location, under `dist` and
 with a new filename.
- Update `tsconfig.json` to use an `ES5` target. I'm not sure if this
 does anything, since we're using Babel to build, not Typescript. But
 whatever, it can't hurt.
- Remove "smart" dynamic `require` logic to [choose a
 renderer](https://react-hooks-testing-library.com/installation#renderer).
 `figbuild` does not support dynamic `require` statements. I also
 deleted tests for this logic.
- Remove submodules structure. Since we're no longer doing dynamic
 requires, we also don't need to output
 `@testing-library/react-hooks/dom` and similar directories.
If and when we move off of `figbuild`, we may be able to un-fork this
library.