Update module github.com/gobwas/ws to v1.4.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
github.com/gobwas/ws	v1.3.2 -> v1.4.0

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Release Notes

gobwas/ws (github.com/gobwas/ws)

### [`v1.4.0`](https://togithub.com/gobwas/ws/releases/tag/v1.4.0) [Compare Source](https://togithub.com/gobwas/ws/compare/v1.3.2...v1.4.0) #### What's Changed - Drop Go 1.15 support by [@​cristaloleg](https://togithub.com/cristaloleg) in [https://github.com/gobwas/ws/pull/191](https://togithub.com/gobwas/ws/pull/191) - Cipher 1.9x speedup by [@​klauspost](https://togithub.com/klauspost) in [https://github.com/gobwas/ws/pull/198](https://togithub.com/gobwas/ws/pull/198) - Extract Autobahn test suite to a separate CI step by [@​cristaloleg](https://togithub.com/cristaloleg) in [https://github.com/gobwas/ws/pull/199](https://togithub.com/gobwas/ws/pull/199) **Full Changelog**: https://github.com/gobwas/ws/compare/v1.3.2...v1.4.0

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Configuration

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