jest-diff: Add changeColor and patchColor options

[pedrottimark]

Summary

Provide options for the remaining 2 hard-coded colors used by diffStringsUnified

Residue: the default export can output 2 additional hard-coded colors in edge cases:

1. cyan for lines for which indentation is the only difference: will be superseded by ignoreIndentation option and no color distinction for such common lines
2. bgYellow for leading or trailing spaces in common lines, because inverse of dim is invisible, but it is not clear that they need formatting

@thymikee after the residue has been solved, it seems like the default colors: false option in snapshot-diff package can replace strip-ansi with identity function for jest-diff color options

Test plan

Added 1 and updated 3 snapshots in diffs.test.ts.snap

Add string serializer to omit double quote marks and use options to omit line colors:

• Updated 24 snapshots in getAlignedDiffs.test.ts.snap
• Updated 6 snapshots in joinAlignedDiffs.test.ts.snap

See also pictures in the following comments

Baseline at left and optional at right

[pedrottimark]

diffStringsUnified(a, b, options)

const options = {
  changeColor: chalk.bold.bgAnsi256(226), // #ffff00
};

const identity = string => string;
const options = {
  aColor: identity,
  bColor: identity,
  changeColor: identity,
  commonColor: identity,
  contextLines: 1,
  expand: false,
  patchColor: identity,
};

[pedrottimark]

diffLinesUnified(a, b, options)

const options = {
  contextLines: 1,
  expand: false,
  patchColor: chalk.dim,
};

const identity = string => string;
const options = {
  aColor: identity,
  bColor: identity,
  changeColor: identity,
  commonColor: identity,
  contextLines: 1,
  expand: false,
  patchColor: identity,
};

Residue 1:

Residue 2:

[codecov-io]

Codecov Report

Merging #8911 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #8911      +/-   ##
==========================================
+ Coverage   64.24%   64.25%   +<.01%     
==========================================
  Files         275      275              
  Lines       11658    11657       -1     
  Branches     2846     2845       -1     
==========================================
  Hits         7490     7490              
  Misses       3544     3544              
+ Partials      624      623       -1

Impacted Files	Coverage Δ
packages/jest-diff/src/normalizeDiffOptions.ts	100% <ø> (ø)	⬆️
packages/jest-diff/src/diffLines.ts	97.12% <100%> (ø)	⬆️
packages/jest-diff/src/printDiffs.ts	97.43% <100%> (+0.96%)	⬆️
packages/jest-diff/src/getAlignedDiffs.ts	100% <100%> (ø)	⬆️
packages/jest-diff/src/joinAlignedDiffs.ts	100% <100%> (ø)	⬆️

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[github-actions]

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