build: update cssnano to 4.1.11

[alexandruandrei91]

Update cssnano from 4.1.10 to 4.1.11 because it had a dependency (is-svg) with a security issue (cssnano/cssnano#1025). They've got rid of that in the 4.1.11 release.

This PR contains a:

• [ x] bugfix
• new feature
• code refactor
• [x ] test update
• typo fix
• metadata update

Motivation / Use-Case

Remove a security vulnerability.

Breaking Changes

Additional Info

Hi! 👋

[codecov]

Codecov Report

Merging #79 (42867fe) into master (5211eed) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #79   +/-   ##
=======================================
  Coverage   99.50%   99.50%           
=======================================
  Files           3        3           
  Lines         200      200           
  Branches       67       67           
=======================================
  Hits          199      199           
  Misses          1        1           

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[alexander-akait]

Please accept CLA

[alexandruandrei91]

Please accept CLA

I did, but for some reason it's still marked as Pending.

You have signed the CLA for webpack-contrib/css-minimizer-webpack-plugin