chore(deps): update dependency behat/behat to v3.8.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
behat/behat (source)	require-dev	patch	3.8.0 -> 3.8.1

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Release Notes

Behat/Behat

### [`v3.8.1`](https://togithub.com/Behat/Behat/blob/master/CHANGELOG.md#​381---2020-11-07) [Compare Source](https://togithub.com/Behat/Behat/compare/v3.8.0...v3.8.1) ##### Fixed - [1329](https://togithub.com/Behat/Behat/pull/1329): Regression when using scalar type hints ([@​ciaranmcnulty](https://togithub.com/ciaranmcnulty))

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