feat(babel): improve filtering capability & performance

[davidtaylorhq]

Rollup Plugin Name: babel

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.

Description

• drops support for rollup 1.x, which allows simplifying the implementation

• implements 'plugin hook filters' for improved performance under rolldown

• passes a new code argument to custom filter functions, so that consumers can add more advanced filtering logic

• allows custom filter functions to be async

[shellscape]

Thanks for the PR. We've got a pause on publishing new versions at the moment with the recent NPM change (I'm the blocker here). Once we get the new tokens setup and whatnot, we'll get this reviewed.

[mansona]

@shellscape would you like some help in setting up the OIDC? We've had some really great experiences using release-plan to automate the process and I'd be happy to have a call and walk you through it if that is something you think would be helpful? (I'm one of the maintainers)

[Andarist]

@davidtaylorhq u have noted this is not a breaking change in the PR's description - but given the changed peer dependency range it has to be treated as a breaking change. Please rebase this and include the BREAKING CHANGE in the first commit

[davidtaylorhq]

Done, thanks for the review @Andarist

[Andarist]

This looks OK but I'm not super involved in the development of this monorepo so I'll leave it to @shellscape to land this