fix: rename & deconflict together

[tivac]

@Morklympious found a bug where if you exercise both the renaming & deconflicting logic the rename (via identifierfy) gets lost and the resulting variable name is no longer valid.

So now it's fixed.

[ghost]

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[codecov]

Codecov Report

Merging #820 (83fdf8b) into main (a636c9b) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #820   +/-   ##
=======================================
  Coverage   99.58%   99.58%           
=======================================
  Files          37       37           
  Lines        1434     1435    +1     
  Branches      232      232           
=======================================
+ Hits         1428     1429    +1     
  Misses          6        6           

Impacted Files	Coverage Δ
packages/css-to-js/css-to-js.js	100.00% <100.00%> (ø)

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