Update devDependencies

• @popperjs/core ^2.10.1 → ^2.10.2
• @rollup/plugin-commonjs ^20.0.0 → ^21.0.0
• clean-css-cli ^5.3.3 → ^5.4.1
• eslint-config-xo ^0.38.0 → ^0.39.0
• rollup ^2.57.0 → ^2.58.0
• stylelint-config-twbs-bootstrap ^2.2.3 → ^2.2.4