[AI-FSSDK] prepare for release javascript-sdk v6.4.0 #1553

Job	Run time
typescript_test	1m 34s
lint	59s
browser_tests (chrome)	7m 9s
unit_tests (18)	51s
browser_tests (safari)	4m 23s
unit_tests (22)	1m 18s
unit_tests (20)	1m 30s
fullstack_production_suite / test	7s
browser_tests (edge)	7m 21s
integration_tests / test	7s
browser_tests (firefox)	7m 37s
unit_tests (24)	1m 22s
lint_markdown_files / lint	1m 14s
Coveralls coverage	0s
	35m 32s

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