releaseAutomat: release 4.0.0

**BREAKING CHANGES**

*   refactor: all Gulp tasks and scripts

**New Features**

*   feat: update Bootstrap to 5.2.2
*   feat: new header on 404 page

**Other changes**

*   refactor: textlint rules
*   refactor: eslint rules
*   refactor: npm script 'todo'
*   refactor: release process
*   fix: use local instance of the Gulp
*   fix: npm script 'prepare'
*   chore: npm up