Update dependency enzyme-adapter-react-16 to v1.15.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
enzyme-adapter-react-16 (source)	1.15.1 -> 1.15.6

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Release Notes

enzymejs/enzyme

v1.15.6

Compare Source

v1.15.5

Compare Source

v1.15.4

Compare Source

v1.15.3

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v1.15.2

Compare Source

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