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

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
prop-types	devDependencies	minor	15.6.2 -> 15.7.2	homepage, source

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Release Notes

facebook/prop-types

### [`v15.7.2`](https://togithub.com/facebook/prop-types/blob/master/CHANGELOG.md#​1572) [Compare Source](https://togithub.com/facebook/prop-types/compare/v15.7.1...v15.7.2) - [Fix] ensure nullish values in `oneOf` do not crash ([#​256](https://togithub.com/facebook/prop-types/issues/256)) - [Fix] move `loose-envify` back to production deps, for browerify usage ([#​203](https://togithub.com/facebook/prop-types/issues/203)) ### [`v15.7.1`](https://togithub.com/facebook/prop-types/blob/master/CHANGELOG.md#​1571) [Compare Source](https://togithub.com/facebook/prop-types/compare/v15.6.2...v15.7.1) - [Fix] avoid template literal syntax ([#​255](https://togithub.com/facebook/prop-types/issues/255), [#​254](https://togithub.com/facebook/prop-types/issues/254))

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