chore(deps): update dependency prop-types to v15.7.2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
prop-types (source)	devDependencies	minor	15.6.2 -> 15.7.2
prop-types (source)	dependencies	minor	15.6.2 -> 15.7.2

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Release Notes

facebook/prop-types

v15.7.2

Compare Source

• [Fix] ensure nullish values in oneOf do not crash (#​256)
• [Fix] move loose-envify back to production deps, for browerify usage (#​203)

v15.7.1

Compare Source

• [Fix] avoid template literal syntax (#​255, #​254)

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[coveralls]

Pull Request Test Coverage Report for Build 744

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 78.261%

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Totals
Change from base Build 640:	0.0%
Covered Lines:	36
Relevant Lines:	45

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💛 - Coveralls