Release 0.4.0

[joshbruce]

Description

• Fixes New release tag? #1271 - New release tag
• Fixes Link resolution failed #1268 - Link resolution failed
• Fixes the option : headerIds is not valid. #1208 - Option headerIds missing

Publisher

• $ npm version has been run.
• Release notes in draft GitHub release are up to date
• Release notes include which flavors and versions of Markdown are supported by this release
• Committer checklist is complete.
• Merge PR.
• Publish GitHub release using master with correct version number.
• $ npm publish has been run.
• Create draft GitHub release to prepare next release.

Note: If merges to master occur after submitting this PR and before running $ npm pubish you should be able to

1. pull from upstream/master (git pull upstream master) into the branch holding this version,
2. run $ npm run build to regenerate the min file, and
3. commit and push the updated changes.

Committer

In most cases, this should be someone different than the publisher.

• Version in package.json has been updated (see PUBLISHING.md).
• release does not change library.
• CI is green (no forced merge required).

[styfle]

It’s finally happening! 🎉

[styfle]

@joshbruce Can you publish today? Thanks 👍