Added

• decompression: Support HTTP responses containing multiple ZSTD frames (#548)
• The ServiceExt trait for chaining layers onto an arbitrary http service just like ServiceBuilderExt allows for ServiceBuilder (#563)

Fixed

• Remove unnecessary trait bounds on S::Error for Service impls of RequestBodyTimeout<S> and ResponseBodyTimeout<S> (#533)
• compression: Respect is_end_stream (#535)
• Fix a rare panic in fs::ServeDir (#553)
• Fix invalid content-lenght of 1 in response to range requests to empty files (#556)
• In AsyncRequireAuthorization, use the original inner service after it is ready, instead of using a clone (#561)