Update Rollup

[gaearon]

Re-submit of #19918.

Don't know if this works yet.

[ymqy]

@gaearon Hi, dan, I've also been working on upgrading the react dependency with rollup lately. I found that you're also doing the same thing. Since my first PR to react was merged, I feel honored and want to actively participate in open-source projects. I have encountered the same CI problems as you, and tried to find solutions and passed the test cases. However,
#26078 there are still some issues left: increased bundle size, some code not being treeshaked. Other than that, there are no obstacles. Regarding the two CI problems that didn't pass, you can update the flowconfig ignore and add a line "./node_modules/resolve/test/." to resolve the yarn_flow issue. As for the yarn_build_combined problem, it won't appear on the main branch anymore, it has been fixed in this PR #25132.

[sebmarkbage]

Outdated