fix: lazy process check

[lukeed]

Allows browser-based imports to bypass the need to shim process.env and process.stdout.

Note: Only basic ANSI color codes (red, blue, bgYellow, etc -- no modifiers) work in the browser.

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Related: lukeed/uvu#37

[codecov-commenter]

Codecov Report

Merging #36 into master will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #36      +/-   ##
==========================================
+ Coverage   98.70%   98.77%   +0.06%     
==========================================
  Files           2        2              
  Lines         155      163       +8     
  Branches       30       29       -1     
==========================================
+ Hits          153      161       +8     
+ Misses          2        1       -1     
- Partials        0        1       +1     

Impacted Files	Coverage Δ
colors.mjs	98.11% <100.00%> (+0.15%)	⬆️
index.mjs	99.09% <100.00%> (+0.03%)	⬆️

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