Bump wiggle from 18.0.2 to 21.0.0 in /native/wasmex

[dependabot]

Bumps wiggle from 18.0.2 to 21.0.0.

Release notes

Sourced from wiggle's releases.

v21.0.0

21.0.0

Released 2024-05-20.

Added

• The wasmtime explore subcommand now supports *.wat files. #8314

• Wasmtime now supports DWARF Fission *.dwp files. #8055

• The wasmtime crate now supports #![no_std], and more information about this transition can be found in #8341. #8463 #8483 #8485 #8528 #8533

• A Config knob is now available for one-entry call_indirect caching to speed up modules with lots of call_indirect instructions. #8509

• Cranelift's riscv64 backend has initial support for the Zfa Extension. #8536

• The WebAssembly tail-calls proposal is now enabled by default when using the Cranelift backend, except for the s390x architecture. #8540

Changed

• Support for NaN canonicalization on x64 has been optimized to avoid branches. #8313

• The bindgen! macro now defaults to assuming imports cannot trap, but this behavior is configurable at macro-generation time. #8310

• The fd_{read,write} implementations in wasmtime-wasi have been optimized. #8303

• The wasmtime-wasi-http crate has been refactored and has improved documentation. #8332

... (truncated)

Commits

• aaa39cb Release Wasmtime 21.0.0 (#8666)
• e882dd8 cranelift: Always consider sret arguments used (#8664) (#8665)
• 1b38670 Release Wasmtime 21.0.0 (#8655)
• 37d71db Add GetHost to generated bindings for more flexible linking (#8448) (#8620)
• 2690964 Backport 8611 to 21.0.0 (#8617)
• 9899578 Fix the version of mach2 in Cargo.toml (#8615)
• 7f3da08 Update wasm-tools crates (#8580) (#8583)
• c9d9098 Use WASI builder directly in C API (#8572) (#8578)
• 89af353 Copy through the authority unmodified to Host (#8563) (#8577)
• 2a23b42 build: add "fastest-runtime" profile for runtime optimization (#8554) (#8575)
• Additional commits viewable in compare view

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[dependabot]

Superseded by #577.