v1.10.0 / 2021-08-18

[bjornstar]

• Update CSS_CLASS_MAP -- https://assets.tumblr.com/pop/cssmap-6fca4540.json (Fixes #78)
• Use textContent instead of innerText for better performance
• [package.json] Update devDependency eslint from v7.10.0 to v7.32.0
• [CHANGELOG.md] Use a slash to separate the version number from the year
• [LICENSE] Update most recent year to 2021