Fix: do not fail on JSX spread attribute in Trans component

[dimazollo]

Why am I submitting this PR

#367

Does it fix an existing ticket?

Yes, it fixes #367

Checklist

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

[codecov-commenter]

Codecov Report

Base: 95.34% // Head: 95.36% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (63fcf74) compared to base (67cf845).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #637      +/-   ##
==========================================
+ Coverage   95.34%   95.36%   +0.02%     
==========================================
  Files          11       11              
  Lines        1633     1641       +8     
==========================================
+ Hits         1557     1565       +8     
  Misses         76       76              

Impacted Files	Coverage Δ
src/lexers/jsx-lexer.js	98.12% <100.00%> (+0.05%)	⬆️

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[karellm]

Deployed as part of 6.6.0. Thanks