Update winreg requirement from 0.50 to 0.51

[dependabot]

Updates the requirements on winreg to permit the latest version.

Release notes

Sourced from winreg's releases.

0.51.0 (windows-sys)

• Breaking change: fix std::fmt::Display implementation for RegValue (#52)
• Add RegKey::encode_transacted() method (pullrequest #55), fixes #54)

Changelog

Sourced from winreg's changelog.

0.12.0, 0.51.0

• Breaking change: fix std::fmt::Display implementation for RegValue (#52)
• Add RegKey::encode_transacted() method (pullrequest #55, fixes #54)

0.50.0

• Breaking change: winapi-rs is not maintained any more, so migrate to Microsofts windows-sys as a backend (#48, #51)
• Breaking change: Increase minimum supported Rust version to 1.46 since windows-sys doesn't compile with older versions
• Replace deprecated methods from chrono (#48)

0.11.0

• Migrate to the 2018 edition of Rust
• Move the code from lib.rs to separate files
• Use cfg-if instead of build.rs to fail build on non-windows systems
• Reimplement deserialization logic, implement [de]serialization for byte arrays (#49)
• Fix some typos and clippy warnings

0.10.1

• Bump the minimal required version of winapi to 0.3.9 (required for load_app_key)
• Reexport REG_PROCESS_APPKEY and use it in the load_app_key example

0.10.0

• Add RegKey::load_app_key() and RegKey::load_app_key_with_flags() (#30)
• Update dev dependency rand to 0.8
• Add Github actions
• Fix some clippy warnings

0.9.0

• Breaking change: OsStr and OsString registry values are not NULL-terminated any more (#34, #42)
• Refactoring: use macros for ToRegValue impls and tests for string values
• Fix bare_trait_objects warning in the doctests
• Add impl ToRegValue for OsString
• Add conversion between REG_MULTI_SZ and vectors of strings (#16)
• Fix: set minimal winapi version to 0.3.7 (earlier versions don't have impl-default and impl-debug features which we use)
• Appveyor now checks the crate against rust-1.31.1 too

0.8.0

• Implement serialization of char and maps
• Implement std::fmt::Display for RegValue
• Make RegKey::{predef,raw_handle,enum_keys,enum_values} functions const
• Give a better error message when compiling on platforms other than Windows (#38)
• Tests are moved from src/lib.rs to tests/reg_key.rs

0.7.0

... (truncated)

Commits

• fc6521e Fix build with rust 1.46
• 60c4210 Merge branch 'winapi'
• ab0995e Bump version to 0.12.0
• f77a078 Fix build with rust 1.31
• edf9eef Fix std::fmt::Display implementation for RegValue
• 8f66f88 Fix build with rust 1.46
• 5bf7d52 Add tests for encode_transacted
• 42aa6f5 Implement RegKey::encode_transacted
• See full diff in compare view

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[LeonarddeR]

@dependabot merge