Prepare 1.0.14 release metadata

[kozw]

Summary

• bump package version to 1.0.14
• add 1.0.14 changelog entry for CalDuration zero-length serialization fix
• update changelog version link for 1.0.14
• include required formatting update from merged PR Fix CalDuration zero-length toString producing invalid ISO 8601 output #45 so release CI stays green

Validation

• dart pub get
• dart format --set-exit-if-changed .
• dart analyze --fatal-infos
• dart test

[Copilot]

Pull request overview

Prepares the repository for the 1.0.14 release by updating the package version and documenting the CalDuration zero-length ISO 8601 serialization fix in the changelog, along with a small formatting-only test adjustment to keep CI formatting checks green.

Changes:

• Bump pubspec.yaml version from 1.0.13 to 1.0.14.
• Add a 1.0.14 changelog entry (dated 2026-07-15) and the corresponding version link.
• Apply formatting to a test line to match dart format output.

Reviewed changes

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

File	Description
test/semantic/calendar_types_test.dart	Formatting-only change to the parseProperty call to align with dart format.
pubspec.yaml	Version bump to 1.0.14 for release.
CHANGELOG.md	Adds 1.0.14 release notes and the 1.0.14 reference link.