v3.0.0 - Consolidate packages into a single package and remove Less

What's Changed

• Update cypress, lerna, postcss, saucectl, stylelint by @anselmbradford in #2010
• Update "banner-notification" page by @sonnakim in #2011
• Remove a-legend class | Move legends inside fieldsets by @anselmbradford in #2009
• Patch bump autoprefixer, lerna, postcss by @anselmbradford in #2012
• Update saucectl 0.180.0 by @anselmbradford in #2013
• Consolidate packages into cfpb-design-system by @anselmbradford in #2005
• Migrate netlify-cms to decap-cms by @anselmbradford in #1980
• Update banner color scheme by @anselmbradford in #2014
• Update font docs by @anselmbradford in #2015
• Add script to decap preview by @anselmbradford in #2016
• Add base index file | Remove less file by @anselmbradford in #2017
• Remove default export by @anselmbradford in #2018
• Pre-v3 prep by @anselmbradford in #2019
• Update decap-cms-app@3.3.2, saucectl@0.183.0, stylelint@16.8.2, cypress@13.13.3, esbuild@0.23.1 by @anselmbradford in #2020

Full Changelog: v2.0.1...v3.0.0