Update Rust crate winreg to 0.56.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
winreg	dependencies	minor	0.55.0 → 0.56.0

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Release Notes

gentoo90/winreg-rs (winreg)

v0.56.0: 0.56.0 (windows-sys)

Compare Source

• Breaking change: RegValue.bytes is now Cow<[u8]> and not Vec<u8> which introduces a lifetime to the structure (#​64).
• Breaking change: serialization now opens the key with DELETE, KEY_ENUMERATE_SUB_KEYS and KEY_QUERY_VALUE permissions in addition to KEY_CREATE_SUB_KEY and KEY_SET_VALUE used previously. This is required for:
• New RegKey methods: encode_destructive() and encode_destructive_transacted() that wipe all subkeys/values of a target key before writing to it (#​76).
• New RegKey methods: enum_keys_os_string() and enum_values_os_string() return iterators that use OsString for key/value names (#​80).
• Add consts for predefined registry keys: HKCR, HKCU, HKLM, HKU and HKCC.
• Implement std traits FromRawHandle, IntoRawHandle and AsRawHandle for Transaction.
• Set windows-sys version to >=0.59, <=0.61 according to its README recomendation.

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