Milestone 2021.5.3

This is a minor improvement and bugfix release.

Analysis

• Added a new IL post-processor which aims to remove locals that are only used once, often on the immediately following line
• Tuned conditional move actions to be more accurate. Thanks to @gompoc in #50 for contributing part of this.
• Improved some of the generic method handling code. This reduces the chance of exceptions while saving, but this entire section of code is awful and needs rewriting, so as a knock-on effect some methods that previously used to generate clean IL no longer will. This is expected and will be remedied in an upcoming release.
• Fixed methods which fail analysis being marked as extern. They will now throw an AnalysisFailedException.

Dummy DLLs

• Emit packing and type sizes to assemblies
• Added new injected type "AnalysisFailedException"
• Made all injected types internal, not public.

LibCpp2IL

• Experimental support for NSO (Nintendo Switch) binaries. This may not work in all cases. Please report any issues you encounter.
• Corrected the metadata version for unity versions 2019.3.0 to 2019.3.6
• Fixed strings being read using the Default encoding instead of UTF8 always, causing incorrect member names on .NET Framework.

Core API

• Cpp2IL will no longer attempt to write files or folders containing the { or } characters as windows can interpret these as GUIDs in specific circumstances, and fail.
• Performance improvements for finding KeyFunctionAddresses on Arm64.
• Attribute restoration pre-metadata-v29 will now detect useless KeyFunctionAddresses (e.g. for binaries which have no exported il2cpp functions) and fallback to simple restoration.

Command-Line Wrapper

• Moved the initialization of and improved the cecil patch so that errors due to attribute restoration are caught.
• Fixed major performance problems on the NetFramework build caused by Enumerable.Skip being incredibly slow.