Update react #2148

Job	Run time
Static analysis	1m 29s
Dependencies, Unit tests (16)	1m 16s
Dependencies, Unit tests (18)	1m 23s
Dependencies, Unit tests (20)	1m 36s
Build libraries	1m 53s
Build application (govuk-docs)	2m 16s
Build application (govuk-template)	1m 40s
Test application (govuk-docs, chromium)	1m 46s
Test application (govuk-docs, firefox)	1m 17s
Test application (govuk-docs, electron)	1m 4s
Test application (govuk-template, chromium)	1m 35s
Test application (govuk-template, firefox)	1m 44s
Test application (govuk-template, electron)	1m 55s
	20m 54s

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