Bump sinon from 15.0.3 to 15.2.0 #436

Job	Run time
Tests and linting (ubuntu-latest, 16)	1m 13s
Tests and linting (ubuntu-latest, 16)	1m 13s
Tests and linting (ubuntu-latest, lts/*)	1m 13s
Tests and linting (ubuntu-latest, lts/*)	1m 13s
Tests and linting (ubuntu-latest, 20)	1m 31s
Tests and linting (ubuntu-latest, 20)	1m 31s
Tests and linting (macos-latest, 16)	2m 2s
Tests and linting (macos-latest, 16)	2m 2s
Tests and linting (macos-latest, lts/*)	2m 37s
Tests and linting (macos-latest, lts/*)	2m 10s
Tests and linting (macos-latest, 20)	2m 10s
Tests and linting (macos-latest, 20)	2m 10s
finish	0s
finish	5s
	21m 10s

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