breaking: drop `allowComposition` option (#1817) #1156

Job	Run time
Unit test (ubuntu-latest, 18.19)	39s
Lint (ubuntu-latest, 18)	33s
Build (ubuntu-latest, 18)	3m 50s
Unit test (ubuntu-latest, 20)	27s
Type checking (ubuntu-latest, 18)	27s
Build (windows-latest, 18)	4m 36s
Unit test (windows-latest, 18.19)	1m 17s
Build (macos-latest, 18)	9m 17s
Unit test (windows-latest, 20)	1m 24s
Unit test (macos-latest, 18.19)	1m 17s
Unit test (macos-latest, 20)	1m 11s
E2E test (ubuntu-latest, 18.19)	55s
E2E test (ubuntu-latest, 20)	53s
E2E test (windows-latest, 18.19)	1m 59s
E2E test (windows-latest, 20)	1m 58s
E2E test (macos-latest, 18.19)	3m 22s
E2E test (macos-latest, 20)	1m 36s
nightly-release (ubuntu-latest, 18)	1m 21s
	37m 2s

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