refactor(@schematics/angular): remove explicit strict true in tsconfi… #1890

Job	Run time
list	25s
workflow (build-cli)	24s
workflow (devkit-core-tests)	25s
workflow (devkit-core-tests-rerun)	22s
workflow (build-unit-tests)	24s
workflow (modules-builder-tests)	25s
	2m 25s

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