chore: set max-line-length in stylelint so auto-formatters pick it up

[mmalerba]

No description provided.

[codecov-io]

Codecov Report

Merging #4307 into master will increase coverage by 0.3%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #4307     +/-   ##
=========================================
+ Coverage      99%   99.31%   +0.3%     
=========================================
  Files         130      130             
  Lines        6232     6232             
  Branches      807      807             
=========================================
+ Hits         6170     6189     +19     
+ Misses         61       42     -19     
  Partials        1        1

Impacted Files	Coverage Δ
packages/mdc-checkbox/component.ts	96.8% <0%> (+1.06%)	⬆️
packages/mdc-tab/component.ts	98.33% <0%> (+3.33%)	⬆️
packages/mdc-base/component.ts	100% <0%> (+3.57%)	⬆️
packages/mdc-ripple/component.ts	100% <0%> (+3.84%)	⬆️
packages/mdc-ripple/util.ts	97.95% <0%> (+4.08%)	⬆️
packages/mdc-auto-init/index.ts	100% <0%> (+4.54%)	⬆️
packages/mdc-tabs/tab/component.ts	100% <0%> (+5%)	⬆️
packages/mdc-switch/component.ts	98.21% <0%> (+7.14%)	⬆️
packages/mdc-radio/component.ts	95.65% <0%> (+8.69%)	⬆️

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[mmalerba]

Oh this apparently causes some lint failures due to existing lines that are too long, I'll fix those and add them to this PR

[kfranqueiro]

Fixed a few nits and updated from master. Running screenshot tests locally right now. Diffed CSS and only diffs were whitespace introduced inside the wrapped calc expressions in toolbar.