ILSpy 6.2.1

This is a bugfix release.

• #2177: PDB Generation is confused by enhanced using statements
• #2183: Incorrect version in binding redirect for AvalonEdit
• #2174: Some compilers produce display class ctors with unused local variables
• #2182: Do not inline switch value, in case variable is reused.
• #2180: Restrict the (uint?)-1 special case to casts to integer types.
• #2185: Fix MemberIsHidden-check for local function display structs