v3.0.0

• Add tileMargin option (#379, @stefslon) (#394, @korpd)
• Upgrade to node 10, es6 (@nyurik)
• Code cleaning and removing unnecessary resources
• Cleanup bundled style and fonts (simplify startup procedure #271)
• Add serveAllStyles option + watch the directory for changes
• Add style validation and skip invalid styles
• Make tileserver-gl-light compatible with node >=10 (#410, @jdesboeufs)
• Fix outlines on semi-transparent edges (#415, @xabbu42)
• Update dependencies