CI/CD

Bump postcss-nested from 6.2.0 to 7.0.2 (#1631) #1993

Job	Run time
Lint files	20s
Test addon (locked dependencies) (ember)	43s
Test addon (floating dependencies) (ember)	47s
Test addon (locked dependencies) (node)	22s
Test addon (floating dependencies) (node)	30s
Test addon (locked dependencies) (test-apps)	39s
Test addon (floating dependencies) (test-apps)	44s
Test compatibility (ember-lts-4.4)	1m 4s
Test compatibility (ember-lts-4.8)	1m 1s
Test compatibility (ember-lts-4.12)	59s
Test compatibility (ember-lts-5.4)	1m 6s
Test compatibility (ember-release)	1m 10s
Test compatibility (ember-beta)	1m 11s
Test compatibility (ember-canary)	1m 6s
Test compatibility (embroider-safe)	1m 11s
	12m 53s

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