Update gnuv2_demangle to 0.5 (#421)

- Support demangling symbols with a trailing static numeric suffix.
- Support demangling namespaces that are actually a whole mangled symbol.
- Support for "in-function-static initialized" symbols.
- Improve `CPLUS_MARKER` detection.
- Full list is [here](https://github.com/Decompollaborate/gnuv2_demangle/blob/main/CHANGELOG.md).

Author: AngheloAlf

Cargo.lock

@@ -179,7 +179,7 @@ encoding_rs = { version = "0.8.35", optional = true }
 # demangler
 cpp_demangle = { version = "0.5", optional = true, default-features = false, features = ["alloc"] }
 cwdemangle = { version = "1.0", optional = true }
-gnuv2_demangle = { version = "0.4", optional = true }
+gnuv2_demangle = { version = "0.5", optional = true }
 msvc-demangler = { version = "0.11", optional = true }
 
 [target.'cfg(windows)'.dependencies]