Qh3

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**Fixed**
- **QuicConnection** ignored ``verify_hostname`` context option (PR 16 by doronz88)

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**Added**
- Support for QUIC mTLS on the client side (PR 13 by doronz88)

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**Added**
- Toggle for hostname verification in Configuration

**Changed**
- Hostname verification can be done independently of certificate verification

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**Added**
- Support for certificate fingerprint matching

**Fixed**
- datetime.utcnow deprecation

**Changed**
- commonName is no longer checked by default

===================

**Added**
- Support for "IP Address" as subject alt name in certificate verifications

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**Removed**
- Dependency on OpenSSL development headers

**Changed**
- Crypto module relies on ``cryptography`` OpenSSL binding instead of our own copy

**Added**
- Explicit support for PyPy