add missing files & set version to 6.0.1

add missing build files to release

install svn if not installed yet during deployment

remove unused script

Merge pull request #119 from liip/improvement/better-property-names

feat(): Improve button property names

Merge pull request #106 from liip/feat/modernize

feat(): Modernize all the things

Merge pull request #117 from liip/fix/button-default-color

fix(): Button default color

Merge pull request #115 from liip/feat/wp-61

feat(): WordPress 6.1 / Button styling

Merge pull request #108 from liip/fix/rename-blocks

fix(): Rename blocks

improve readme