feat(multi-entry): support watch mode

[GauBen]

Rollup Plugin Name: multi-entry

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

If yes, then include "BREAKING CHANGES:" in the first commit message body, followed by a description of what is breaking.

List any relevant issue numbers: resolves #1862

Description

The plugin now adds folders (using the best heuristic as possible) to Rollup watch list.

For instance, if input is src/**/*.js, the src directory is watched, in its entirety.

Other than that, I have rewritten the plugin as TypeScript, cause why not, and used tinyglobby to address many deprecation issues

[GauBen]

This is not a breaking change, providing a regex would cause an undefined behavior at this line:

const patterns = config.include.concat(config.exclude.map((pattern) => `!${pattern}`));

[shellscape]

Looks like a CI error that's outside of the scope of your PR. Will take a look at this soon.

[shellscape]

@GauBen please update from master and resolve the conflicts, and we can get this in.

[shellscape]