Update all patch updates (patch)

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@openzeppelin/test-helpers	0.5.11 -> 0.5.12
@truffle/contract	4.3.23 -> 4.3.24

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Release Notes

OpenZeppelin/openzeppelin-test-helpers

### [`v0.5.12`](https://togithub.com/OpenZeppelin/openzeppelin-test-helpers/blob/master/CHANGELOG.md#​0512-2021-07-05) [Compare Source](https://togithub.com/OpenZeppelin/openzeppelin-test-helpers/compare/v0.5.11...v0.5.12) - Added new `snapshot` module to capture and revert blockchain state.

trufflesuite/truffle

### [`v4.3.24`](https://togithub.com/trufflesuite/truffle/compare/abfb3646eea9d57e0a6f9186c12bb51680c181d8...46b6a05440426e664ec65827e90789334783edac) [Compare Source](https://togithub.com/trufflesuite/truffle/compare/abfb3646eea9d57e0a6f9186c12bb51680c181d8...46b6a05440426e664ec65827e90789334783edac)

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