Dotnet Webassembly Versions Save

• For .NET 3.1 or higher, BitOperations are leveraged to accelerate 32 and 64-bit WASM instructions for count of leading 0 bits, count of 1 bits, count of trailing 0 bits, rotate left, and rotate right.

Fixed the "WebAssemblyValueType 7 not recognized." error encountered during compilation of some WASMs. Thanks @munik!

• Added a .NET Standard 2.0 build.

• Block-type instructions that returned their type in .ToString now more closely match the WAT format; "block (returns i32)" is now "block i32", for example.
• This is the first formal release, breaking changes should be rare going forward.

• First non-preview release!
  • The APIs for creation and modification of WASM files have been stable for a long time, so no need to hold it back any longer.
  • Compilation still has numerous gaps in specification compliance, but has enough "core" functionality to call it a beta.
• Significantly improved compilation compatibility by fixing multiple issues with branches that continue a loop.
• Added several constructors to simplify creation of WASM-related objects.

• Improved compilation compatibility thanks to https://github.com/RyanLamansky/dotnet-webassembly/pull/31 by @tana.

• Significantly improved compilation compatibility thanks to https://github.com/RyanLamansky/dotnet-webassembly/pull/30 by @tana.

• .NET Core 3.1 or higher is now required, the .NET Standard builds have been removed.
• Added support for sign extension and saturating truncation operators thanks to @tgjones.
• Indirect functions with no parameters and no returns are now supported.
• Fixed multiple issues with memory imports, unblocking some spec test scenarios.
• The default .ToString for instructions now returns the native WebAssembly opcode name.

• Compiled exports now have an attribute indicating their native export type and name.
• Runtime global imports now accept raw delegates.
• Various bug fixes.

Breaking Changes

• Out of range import types throw ModuleLoadException instead of IndexOutOfRangeException.
• RuntimeException is now abstract.
• Missing or incorrectly typed imports now throw ImportException instead of ArgumentException.
• ImportDictionary's only member, an Add method, was changed to an extension method, which is binary-breaking but not code-breaking.

• Contents of grown memory is now initialized to 0 before being made available for use. Special thanks to @TYoung86 for identifying and fixing this issue.
• Memory can now grow from an initial size of zero.
• Improved disposal tracking of UnmanagedMemory.
  • Previously it was possible to un-dispose objects of this type by calling Grow. An object revived in this way would leak memory if it was not explicitly Disposed before being discarded.
• Added .NET Standard 2.1 build with no dependencies.