Add resetDefaultValueLocale option

[lars-mortenson]

Why am I submitting this PR

Add a feature related to resetting translations for a key if the default value changes.

Does it fix an existing ticket?

Yes #267

Checklist

• [ X] only relevant code is changed (make a diff before you submit the PR)
• [ X] tests are included and pass: yarn test (see details here)
• [ X] documentation is changed or added

[codecov-commenter]

Codecov Report

Merging #451 (80be955) into master (38c0d9b) will increase coverage by 1.34%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #451      +/-   ##
==========================================
+ Coverage   90.48%   91.83%   +1.34%     
==========================================
  Files          12       12              
  Lines         778      796      +18     
==========================================
+ Hits          704      731      +27     
+ Misses         74       65       -9     

Impacted Files	Coverage Δ
src/helpers.js	100.00% <100.00%> (ø)
src/transform.js	86.26% <100.00%> (+6.03%)	⬆️

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[swain]

@karellm any update here? I think several people could benefit from this change being merged.

[karellm]

Thanks for the PR, it looks good. My only concern is that I would like more test at the parser level. I don't like the code coverage reduction. Could you add some while you address my other comment about the README?

[lars-mortenson]

Thanks for the PR, it looks good. My only concern is that I would like more test at the parser level. I don't like the code coverage reduction. Could you add some while you address my other comment about the README?

No problem, I should have an update shortly.

[swain]

@karellm any update on this PR? Looks like the changes you requested have been addressed.

[lars-mortenson]

Hey @karellm, any remaining issues with these changes?

[karellm]

Sorry for the delay. Thanks for the great work, I'm deploying it as 5.2.0