Bump chai from 4.5.0 to 5.2.1 #780

Job	Run time
check-and-lint	2m 44s
adapter-tests (18.x, ubuntu-latest)	2m 56s
adapter-tests (18.x, windows-latest)	1m 47s
adapter-tests (18.x, macos-latest)	1s
adapter-tests (20.x, macos-latest)	1s
adapter-tests (20.x, windows-latest)	2m 9s
adapter-tests (20.x, ubuntu-latest)	4m 31s
deploy	0s
	14m 9s

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