This has some added potential for unintended side effects, because now twentyseventeen/assets/css/blocks.css is loading beforetwentyseventeen-wp20/style.css, but I haven't spotted any in testing. The 20 Years post is the only one that uses the Button block so far.
See #76
This fixes the margins for the Spotify button on https://wp20.mystagingwebsite.com/20-years-of-wordpress-jazz/. The colors may need to be manually fixed after launch, since they're set in the editor.
This has some added potential for unintended side effects, because now
twentyseventeen/assets/css/blocks.cssis loading beforetwentyseventeen-wp20/style.css, but I haven't spotted any in testing. The20 Yearspost is the only one that uses the Button block so far.