v0.8.0

This release would not be possible without the work of @unlocomqx and @tiatin. Many thanks!

• Add auto import for components!
• Highlight not imported components
• Mark unused component imports properly
• Fix Svelte blocks breaking on identifiers containing the words if, as or then
• Support @html & @debug expressions
• Display better error messages for incomplete code
• Extend supported IDE version range to 2019.2