Bump version to 0.21.0

[JulianSchmid]

Summary by CodeRabbit

• Documentation

  • Updated usage instructions and documentation links to version 0.21.0.
  • Added the Linux SLL packet slicing option to the documented methods.

• Chores

  • Updated crate version references from 0.20.3 to 0.21.0 across the project.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 167728a9-28c0-4a66-b71d-6d7774b47f11

📥 Commits

Reviewing files that changed from the base of the PR and between 1f111d3 and 0264d41.

📒 Files selected for processing (4)

• README.md
• etherparse/Cargo.toml
• etherparse/src/lib.rs
• etherparse_proptest_generators/Cargo.toml

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📝 Walkthrough

Walkthrough

The release references are updated from 0.20.3 to 0.21.0 across crate manifests, crate documentation, README dependency examples, and README API links. The README also documents SlicedPacket::from_linux_sll.

Changes

0.21.0 release references

Layer / File(s)	Summary
Version and documentation synchronization README.md, etherparse/Cargo.toml, etherparse/src/lib.rs, etherparse_proptest_generators/Cargo.toml	Both crate manifests, usage snippets, and README links now reference version 0.21.0; the slicing method list includes SlicedPacket::from_linux_sll.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• JulianSchmid/etherparse#145: Similar README version and docs.rs link maintenance.
• JulianSchmid/etherparse#153: Similar crate version, README, and documentation reference updates.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: bumping the project version to 0.21.0.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bump-version

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