4.1.0

New features

• Add add_scopes convenience methods to request objects (#138)
• Add set_redirect_uri method to CodeTokenRequest (#144)

Bug fixes

• Await the given sleep method in DeviceAccessTokenRequest::request_async (#152)
• Fix curl client implementation (#147)
• Update docs to reference current version

Other changes

• Don't depend on chrono oldtime (#149)
• Update dependencies (base64, rand, hmac) (#145)
• Update Microsoft example to use unified Azure app registration (#143)