wasm32 support

[arvidn]

Rayon doesn't support wasm32, which is used by criterion. So benchmarks are disabled for wasm32.

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Note

Medium Risk
Mostly build/test and target-specific dependency changes, but it also changes atom-size acceptance and parsing behavior in serde/parse_atom.rs, which could affect compatibility for extremely large serialized inputs.

Overview
Adds wasm32-unknown-unknown support across the crate and CI.

CI now runs a dedicated wasm_tests job that installs wasm-bindgen-test-runner and executes cargo test for the clvmr crate on the WASM target; rust-toolchain.toml also includes the WASM target.

To make tests portable, a wasm_compat::test shim is introduced and applied broadly so unit/rstest tests can run under wasm-bindgen-test; WASM builds also avoid criterion (Rayon) by making it a non-wasm dev-dependency, add WASM-specific getrandom configuration, and embed op-test fixtures via include_str! for WASM. Serialization parsing is tightened for WASM by bounding atom sizes to fit in usize (32-bit) and using fallible usize conversions when slicing/advancing cursors.

^{Written by Cursor Bugbot for commit 94c2221. This will update automatically on new commits. Configure here.}

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	cargo/​wasm-bindgen-test@​0.3.50

View full report

[socket-security]

All alerts resolved. Learn more about Socket for GitHub.

This PR previously contained dependency changes with security issues that have been resolved, removed, or ignored.

Ignoring alerts on:

• cargo/minicov@0.3.8

View full report

[arvidn]

@SocketSecurity ignore cargo/minicov@0.3.8

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[coveralls-official]

Pull Request Test Coverage Report for Build 22691930026

Details

• 6 of 6 (100.0%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.001%) to 88.262%

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Files with Coverage Reduction	New Missed Lines	%
src/serde/parse_atom.rs	1	99.14%

Totals
Change from base Build 22681542686:	0.001%
Covered Lines:	6978
Relevant Lines:	7906

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💛 - Coveralls

[github-actions]

'This PR has been flagged as stale due to no activity for over 60
days. It will not be automatically closed, but it has been given
a stale-pr label and should be manually reviewed.'