chore(Hexo): add event emitter descriptor

[dimaslanjaka]

What does it do?

add event emitter description for easily typings on VSCode, Intellij IDEA, or other IDE

Screenshots

Pull request tasks

• [ ] Add test cases for the changes.
• [x] Passed the CI test.

[github-actions[bot]]

How to test

git clone -b add-event-emitter-description https://github.com/dimaslanjaka/hexo.git
cd hexo
npm install
npm test

[coveralls]

Pull Request Test Coverage Report for Build 7301039144

• 82 of 82 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.004%) to 99.54%

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Totals
Change from base Build 7070586365:	0.004%
Covered Lines:	9088
Relevant Lines:	9130

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💛 - Coveralls