[AI-FSSDK] prepare for release javascript-sdk v6.4.0 (#1149) #1556

Job	Run time
typescript_test	1m 31s
lint	1m 1s
unit_tests (18)	1m 47s
browser_tests (chrome)	7m 49s
unit_tests (24)	1m 21s
browser_tests (edge)	7m 31s
unit_tests (22)	1m 56s
browser_tests (firefox)	8m 10s
lint_markdown_files / lint	1m 4s
fullstack_production_suite / test	7s
unit_tests (20)	1m 30s
browser_tests (safari)	4m 12s
integration_tests / test	9s
Coveralls coverage	3s
	38m 11s

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