do not crash on incomplete media queries

[bartveneman]

closes #440

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.86%. Comparing base (b486fcf) to head (407cf9d).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #441      +/-   ##
==========================================
- Coverage   99.86%   99.86%   -0.01%     
==========================================
  Files          18       18              
  Lines        2235     2234       -1     
==========================================
- Hits         2232     2231       -1     
  Misses          3        3              

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[codecov-commenter]

Bundle Report

Changes will increase total bundle size by 1 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
analyzeCss-analyzeCss-esm	99.26kB	-11 bytes (-0.01%) ⬇️
analyzeCss-analyzeCss-esm-analyzeCss-umd	68.21kB	12 bytes (0.02%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: analyzeCss-analyzeCss-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
analyze-*.js	-11 bytes	99.26kB	-0.01%

Files in analyze-*.js:

• ./src/atrules/atrules.js → Total Size: 2.72kB

view changes for bundle: analyzeCss-analyzeCss-esm-analyzeCss-umd

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
analyze-*.umd.cjs	12 bytes	68.21kB	0.02%

Files in analyze-*.umd.cjs:

• ./src/atrules/atrules.js → Total Size: 2.72kB