chore: bump version.

[morganney]

BREAKING CHANGES:

• span-bearing nodes always expose node.span but it may be undefined, so callers must handle that case

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.32%. Comparing base (ff7c9b6) to head (cb53ffb).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #22   +/-   ##
=======================================
  Coverage   99.32%   99.32%           
=======================================
  Files           3        3           
  Lines        1187     1187           
  Branches       82       82           
=======================================
  Hits         1179     1179           
  Misses          6        6           
  Partials        2        2           

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[Copilot]

Pull request overview

This PR bumps the package version from 1.0.1 to 2.0.0-rc.0 in preparation for a major release with breaking changes. The breaking change involves span-bearing nodes always exposing node.span which may be undefined, requiring callers to handle that case.

• Version updated to 2.0.0-rc.0 (release candidate for major version)
• Version synchronized across package.json and package-lock.json
• Follows semantic versioning with appropriate pre-release tag

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
package.json	Updated version field to 2.0.0-rc.0
package-lock.json	Updated version in root package metadata (lines 3 and 9) to maintain consistency

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