Update escape-string-regexp requirement from ^1.0.5 to ^2.0.0
Update escape-string-regexp requirement from ^1.0.5 to ^2.0.0

Updates the requirements on [escape-string-regexp](https://github.com/sindresorhus/escape-string-regexp) to permit the latest version.
- [Release notes](https://github.com/sindresorhus/escape-string-regexp/releases)
- [Commits](https://github.com/sindresorhus/escape-string-regexp/compare/v1.0.5...v2.0.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
hexojs/hexo-fs,hexojs/hexo-fs