feat: Rollup@1.0 support

[tivac]

Had to change how the plugin reported dependencies, as well as invent a new way of marking files as being replaceable in processor.invalidate(). Used to just .remove() them but the transform hook isn't getting called for unchanged files again, presumably due to the caching layer.

This has the downside of never removing files when they've been deleted/renamed, but I think that's probably ok? We'll see! At the very least it won't be a breaking change to add functionality to check for the file on disk when the watchChange event fires and then removing files that are gone after we've invalidated them.

[codecov]

Codecov Report

Merging #532 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #532      +/-   ##
==========================================
+ Coverage   99.11%   99.13%   +0.01%     
==========================================
  Files          39       40       +1     
  Lines         907      922      +15     
  Branches      135      138       +3     
==========================================
+ Hits          899      914      +15     
  Misses          8        8

Impacted Files	Coverage Δ
packages/processor/processor.js	100% <100%> (ø)	⬆️
packages/rollup/rollup.js	100% <100%> (ø)	⬆️
packages/test-utils/rollup-code-snapshot.js	100% <100%> (ø)

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[lukastaegert]

BTW not deleting files is quite in line with what rollup does i.e. just use hashes in watch mode, make some changes and watch your target directory fill up...

I guess we need a dedicated cleanup plugin that uses the "manifest" you get in the generateBundle hook to clean up the diffing files. That is if you use the asset emission API.