v0.5.0

• Use scalameta and ph-css instead of treehugger and cssparser
• Bulma was missing isArrowless and isMultiple
• Bootstrap 4 is upgraded from 4.2 to 4.3
• Prefixed version of DSLs
• Common top-level package cssdsl
• The DSL objects themselves are named consistently, Dsl for unprefixed, XxDsl for prefix xx.
• Support [class] selectors when they don't end with -
• Add Semantic UI
• Add support for scalatags.Text on JVM