v0.1.1

[SpriteOvO]

Normal changes:

• Added a sink WinDebugSink.
• Allowed to configure level filters of loggers via environment variable SPDLOG_RS_LEVEL.
• Implemented AsRef<OsStr> for FlexibleString.
• Extracted FlexibleString to a separate crate flexible-string.

Breaking changes:

• Logger struct removed new function and Default trait.
• Logger names no longer allow any of these characters: , = * ? $ { } " ', and cannot start or end with a whitespace.
• Mark non_exhaustive attribute for Error enum.

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This discussion was created from the release v0.1.1.