Tests

Bump cssnano from 6.1.0 to 6.1.1 #161

Job	Run time
Code Hygiene	2m 10s
Integration tests (ubuntu-latest)	4m 27s
Render tests (ubuntu-latest, 0)	7m 4s
Unit tests and Coverage	1m 56s
Integration tests (windows-latest)	5m 29s
Render tests (ubuntu-latest, 1)	6m 50s
Render tests (ubuntu-latest, 2)	5m 54s
Render tests (windows-latest, 0)	8m 39s
Build tests (ubuntu-latest)	3m 27s
Render tests (windows-latest, 1)	8m 6s
Build tests (windows-latest)	4m 34s
Render tests (windows-latest, 2)	7m 0s
	1h 5m 36s

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