chore(td-tools): enable eslint/strict-boolean-expressions and strictNullChecks #1933

Job	Run time
Check version consistency of packages	10s
Check coding style	18s
eslint	1m 45s
setup-and-test (ubuntu-latest, 18.x)	32m 7s
setup-and-test (ubuntu-latest, 20.x)	32m 8s
	1h 6m 28s

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