Update changelog with 3.0 changes

+semver: major

Author: Krusen

CHANGELOG.md

@@ -7,14 +7,60 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 
+## [3.0.0]
+There is a few changes to the public API, but most people shouldn't be affected by this unless they have extended/overriden functionality.
+Basic usage should not see any or only minor changes compared to v2.3.0.
+
+Implemented async support for parsing/encoding.
+
+Added build targets for .NET Core 2.1 and .NET Core 3.0 to take advantage of performance improvements
+in `Stream` and `Encoding` APIs for .NET Core 2.1 or later.
+
+Rewrite of internal parsing for better performance, taking advantage of new `Span<T>`/`Memory<T>`
+types - faster parsing and less memory allocation.
+
+Removed support for .NET Framework 4.5 and .NET Standard 1.3.
+Lowest supported versions are now .NET Framework 4.6.1 (4.7.2 highly recommended) and .NET Standard 2.0.
+
+
+### Added
+- Implemented parsing/encoding using `PipeReader`/`PipeWriter`
+- Added `BencodeReader` as replacement for `BencodeStream`
+- Added `IBObject.GetSizeInBytes()` method, returning the size of the object in number of bytes.
+
+### Changed
+- Improved parsing/encoding performance
+- Reduced memory allocation on parsing/encoding
+- Made `BString`, `BNumber`, `BList` and `BDictionary` classes `sealed`
+- Made parse methods of `BencodeParser` virtual so it can be overriden if needed by anyone
+- Constructor `BString(IEnumerable<byte> bytes, Encoding encoding = null)` changed to `BString(byte[] bytes, Encoding encoding = null)`
+- Exposed value type of `BString` changed from `IReadOnlyList<byte>` (`byte[]` internally) to `ReadOnlyMemory<byte>`
+- Removed parse method overloads on `IBencodeParser` and added matching extension methods instead
+- Removed encode method overloads on `IBObject` and added matching extension methods instead
+- Torrent parse mode now default to `TorrentParserMode.Tolerant` instead of `TorrentParserMode.Strict`
+- Torrent related classes moved to `BencodeNET.Torrents` namespace
+
+### Removed
+- Removed `BencodeStream` and replaced with `BencodeReader`
+- Dropped .NET Standard 1.3 support; .NET Standard 2.0 is now lowest supported version
+- Dropped .NET Framework 4.5 support; .NET Framework 4.6.1 is now lowest supported version (but 4.7.2 is highly recommended)
+- Removed most constructors on `BencodeParser` leaving only `BencodeParser(Encoding encoding = null)` and
+  added `BencodeParser.Encoding` property to enable changing encoding. Parsers can still be added/replaced/removed
+  through `BencodeParser.Parsers` property.
+
+### Fixed
+- Parsing from non-seekable `Stream`s is now possible
+- Fixed issue parsing torrent files with non-standard 'announce-list' (#39)
+
+
 ## [2.3.0] - 2019-02-11
 ### Added
-- `BNumber` casting operators to `int?` and `long?`
+- Added `BNumber` casting operators to `int?` and `long?`
 
 
 ## [2.2.9] - 2017-08-05
 ### Added
-- Tolerant parse mode for torrents, which skips validation
+- Added tolerant parse mode for torrents, which skips validation
 - Save original info hash when parsing torrent
 
 ### Changed
@@ -75,7 +121,8 @@ and generally better usability; albeit a bit more complex.
 ## [1.0.0] - 2015-09-19
 
 
-[Unreleased]: ../../compare/v2.3.0...HEAD
+[Unreleased]: ../../compare/v3.0.0...HEAD
+[3.0.0]: ../../compare/v2.3.0...v3.0.0
 [2.3.0]: ../../compare/v2.2.9...v2.3.0
 [2.2.9]: ../../compare/v2.2.0...v2.2.9
 [2.2.2]: ../../compare/v2.1.0...v2.2.2