fix: support guppylang internals API changes

[qartik]

Summary

• Add compatibility shims for guppylang-internals API changes around type member registration and CustomFunctionDef.
• Widen dependency metadata to support the stable guppylang 0.21.x line while excluding the 1.0.0a* prerelease API line.
• Refresh uv.lock with the updated dependency constraints.

Root Cause

Newer guppylang-internals versions renamed DEF_STORE.register_impl(...) to DEF_STORE.register_type_member(...). The CustomFunctionDef constructor also differs across the supported guppylang-internals versions, so direct construction needed to account for both signatures.

Validation

• uv run pytest -q
• uvx ruff check src/guppy_gpu/decorator.py
• Stable compatibility matrix for non-yanked guppylang versions from 0.21.4 through 0.21.16
• Clean install matrix for non-yanked guppylang versions from 0.21.4 through 0.21.16

[Copilot]

Pull request overview

This PR updates guppy-gpu to remain compatible across a wider range of guppylang-internals / guppylang versions by introducing small compatibility shims for renamed APIs and constructor signature changes, and by adjusting dependency constraints accordingly.

Changes:

• Add a DEF_STORE.register_type_member/register_impl compatibility shim and route type-member registration through it.
• Add a CustomFunctionDef construction shim to tolerate constructor signature differences across supported versions.
• Update pyproject.toml dependency bounds (and bump package version to 0.1.2) to support the 0.21.x stable line while excluding 1.0.0a* prereleases.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/guppy_gpu/decorator.py	Adds shims for DEF_STORE member registration and CustomFunctionDef creation; updates call sites to use them.
pyproject.toml	Bumps package version and adjusts dependency constraints/upper bounds to match the targeted compatibility range.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 3 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 4 changed files in this pull request and generated no new comments.