Update dependency cssnano to v4.1.11

This MR contains the following updates:

Package	Type	Update	Change
cssnano	dependencies	patch	4.1.10 -> 4.1.11

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Release Notes

cssnano/cssnano (cssnano)

v4.1.11

Compare Source

4.1.11

Bug Fixes

• fix CVE-2021-28092

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