fix(deps): update rust crate rhai to ~1.26.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rhai (source)	dependencies	minor	~1.25.0 → ~1.26.0

Important

Rhai updates can cause breaking changes for users. Make sure to add a feat_-prefixed changeset to alert users of the upgrade!

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Release Notes

rhaiscript/rhai (rhai)

v1.26.0

==============

The major change in this version is the addition of the experimental Rhai Grain bytecodes compiler
and VM for fast evaluation of scripts.

This is a work-in-progress and is not yet fully integrated into the main Engine API.

It is gated under the grain feature flag.

Rhai Grain VM

• Add the experimental Rhai Grain bytecodes compiler and VM (requires the grain feature) for fast evaluation of scripts (thanks @ImTheSquid #1109).

Bugs found in the process

Since the Rhai Grain VM must run a script exactly the same as the standard AST interpreter, a number of bugs have been uncovered that are now fixed.

• Fixes a very serious bug in optimizer that erroneously removes statements involving variable access which should be considered side effects (#1126).
• Fixes a serious bug with function pointers being called in method-call style with curried arguments; the arguments were passed to a native Rust function in the wrong order. (#1139).
• Fixes bug in switch statement that fails to try ranges when all conditions of exact matches fail (#1117).
• Fixes bug in switch statement that fails to match shared values (#1123).
• Fixes bug in optimizer that fails to optimize closures (#1114).

Bug fixes

• Fixes bug in Engine::compact_script that generates invalid compacted scripts due to missing spaces between ambiguous operators (thanks @yuvalrakavy #1106).

Enhancements

• BloomFilterU64 is modified to take the sizes of the bit array as a const generic parameter instead of hard-coded to be 256 slots (32 bytes).
• The serde and metadata features can now be used in no-std builds (#1130).
• Allow no-std builds for WASM (#1155).

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