jest-haste-map: fix bug where platform-specific files are removed

[jeanlauliac]

Another fix for jest-haste-map 😁
This changeset fixes the bug that was reproduced by the test I added a few days ago, where platform-specific file removals aren't taken into account. I traced this back to the fact the logic just copies the entire module metadata for a particular Haste name, without discriminating between platforms. That means if any of the files for that Haste name is still here, all the platforms already cached are included in the new map, even if some of these files were deleted. With the new logic, we only copy over the data for the platform of the file being processed.

I didn't check how that behaves for the watch mode but I suspect this fixes the bug for it as well. I can follow up with another test for that.

[rickhanlonii]

Great stuff, missing a changelog 😄

[jeanlauliac]

The linter (yarn lint --fix) changed a completely unrelated file in the website folder, I assume listing was broken on master .

I added the line to the changelog. I've got bad habits ahah, I already made a few fixes before that weren't added to the changelog.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@508f789). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master    #5534   +/-   ##
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  Coverage          ?   61.71%           
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  Files             ?      213           
  Lines             ?     7149           
  Branches          ?        4           
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  Hits              ?     4412           
  Misses            ?     2736           
  Partials          ?        1

Impacted Files	Coverage Δ
packages/jest-haste-map/src/index.js	96.19% <100%> (ø)

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[cpojer]

Nice, thanks for fixing this.

Re the prettier issue: I wanted to fix it this morning but got carried away and forgot.

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