Bump ember-cli-addon-docs-esdoc from 0.2.3 to 0.4.0

Bumps [ember-cli-addon-docs-esdoc](https://github.com/ember-learn/ember-cli-addon-docs-esdoc) from 0.2.3 to 0.4.0.
- [Release notes](https://github.com/ember-learn/ember-cli-addon-docs-esdoc/releases)
- [Changelog](https://github.com/ember-learn/ember-cli-addon-docs-esdoc/blob/master/CHANGELOG.md)
- [Commits](ember-learn/ember-cli-addon-docs-esdoc@v0.2.3...v0.4.0)

---
updated-dependencies:
- dependency-name: ember-cli-addon-docs-esdoc
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>