chore(deps): update dependency less to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
less (source)	3.13.1 -> 4.0.0

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Release Notes

less/less.js

v4.0.0

Compare Source

• #​3573 v4.0.0 (#​3573) (@​matthew-dean)

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[codecov]

Codecov Report

Merging #446 (36e059a) into master (8f4a396) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #446   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines           32        32           
=========================================
  Hits            32        32           

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