chore(deps): update dependency less to v4.1.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
less (source)	4.0.0 -> 4.1.0

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Release Notes

less/less.js

v4.1.0

Compare Source

Mixin parentheses requirement removed

This was maybe too big a change without some kind of deprecation or conversion.
So for this version, this works again:

.mixin;

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[codecov]

Codecov Report

Merging #456 (fca6d39) into master (9c9d851) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #456   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines           32        32           
=========================================
  Hits            32        32           

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