Bump diff from 7.0.0 to 8.0.0 in /src/Frontend

[dependabot]

Bumps diff from 7.0.0 to 8.0.0.

Changelog

Sourced from diff's changelog.

8.0.0

• #580 Multiple tweaks to diffSentences:
  • tokenization no longer takes quadratic time on pathological inputs (reported as a ReDOS vulnerability by Snyk); is now linear instead
  • the final sentence in the string is now handled the same by the tokenizer regardless of whether it has a trailing punctuation mark or not. (Previously, "foo. bar." tokenized to ["foo.", " ", "bar."] but "foo. bar" tokenized to ["foo.", " bar"] - i.e. whether the space between sentences was treated as a separate token depended upon whether the final sentence had trailing punctuation or not. This was arbitrary and surprising; it is no longer the case.)
  • in a string that starts with a sentence end, like "! hello.", the "!" is now treated as a separate sentence
  • the README now correctly documents the tokenization behaviour (it was wrong before)
• #581 - fixed some regex operations used for tokenization in diffWords taking O(n^2) time in pathological cases
• #595 - fixed a crash in patch creation functions when handling a single hunk consisting of a very large number (e.g. >130k) of lines. (This was caused by spreading indefinitely-large arrays to .push() using .apply or the spread operator and hitting the JS-implementation-specific limit on the maximum number of arguments to a function, as shown at https://stackoverflow.com/a/56809779/1709587; thus the exact threshold to hit the error will depend on the environment in which you were running JsDiff.)
• #596 - removed the merge function. Previously JsDiff included an undocumented function called merge that was meant to, in some sense, merge patches. It had at least a couple of serious bugs that could lead to it returning unambiguously wrong results, and it was difficult to simply "fix" because it was unclear precisely what it was meant to do. For now, the fix is to remove it entirely.
• #591 - JsDiff's source code has been rewritten in TypeScript. This change entails the following changes for end users:

  • the diff package on npm now includes its own TypeScript type definitions. Users who previously used the @types/diff npm package from DefinitelyTyped should remove that dependency when upgrading JsDiff to v8.

    Note that the transition from the DefinitelyTyped types to JsDiff's own type definitions includes multiple fixes and also removes many exported types previously used for options arguments to diffing and patch-generation functions. (There are now different exported options types for abortable calls - ones with a timeout or maxEditLength that may give a result of undefined - and non-abortable calls.) See the TypeScript section of the README for some usage tips.

  • The Diff object is now a class. Custom extensions of Diff, as described in the "Defining custom diffing behaviors" section of the README, can therefore now be done by writing a class CustomDiff extends Diff and overriding methods, instead of the old way based on prototype inheritance. (I think code that did things the old way should still work, though!)

  • diff/lib/index.es6.js and diff/lib/index.mjs no longer exist, and the ESM version of the library is no longer bundled into a single file.

  • The ignoreWhitespace option for diffWords is no longer included in the type declarations. The effect of passing ignoreWhitespace: true has always been to make diffWords just call diffWordsWithSpace instead, which was confusing, because that behaviour doesn't seem properly described as "ignoring" whitespace at all. The property remains available to non-TypeScript applications for the sake of backwards compatability, but TypeScript applications will now see a type error if they try to pass ignoreWhitespace: true to diffWords and should change their code to call diffWordsWithSpace instead.

  • JsDiff no longer purports to support ES3 environments. (I'm pretty sure it never truly did, despite claiming to in its README, since even the 1.0.0 release used Array.map which was added in ES5.)

• #601 - diffJson's stringifyReplacer option behaves more like JSON.stringify's replacer argument now. In particular:
  • Each key/value pair now gets passed through the replacer once instead of twice
  • The key passed to the replacer when the top-level object is passed in as value is now "" (previously, was undefined), and the key passed with an array element is the array index as a string, like "0" or "1" (previously was whatever the key for the entire array was). Both the new behaviours match that of JSON.stringify.
• #602 - diffing functions now consistently return undefined when called in async mode (i.e. with a callback). Previously, there was an odd quirk where they would return true if the strings being diffed were equal and undefined otherwise.

Commits

• f87a74c v8.0.0 released (#607)
• 8e81ac5 Upgrade build deps to latest versions with yarn upgrade --latest (#605)
• 064eb9d Bump http-proxy-middleware from 2.0.7 to 2.0.9 (#604)
• 177a93a Rip out some generic stuff (with some broken formatting) from CONTRIBUTING.md...
• dd1c4e0 TypeScript rewrite (#591)
• 2c36f81 Fix async mode return value quirk (#602)
• c376585 Fix stringifyReplacer (#601)
• d2fb347 Stop publishing runtime.js to npm (#599)
• 078167c Add test for case where oldHeader and newHeader are omitted in structuredPatc...
• de70072 Remove no-longer-needed npm-debug.log entry from .gitignore (#597)
• Additional commits viewable in compare view

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Superseded by #2441.