v1.5.2

v1.5.2

• fix(markers): get/clear selected markers
• fix: series doesn't receive markers nor regions
• fix(events): tooltip fails when it's disabled (#117)
• perf: massively improves performance when not using labels (#115)
• style: replace let with const for the sake of consistency
• refactor: abstract the zoom handlers
• style: replace let with const
• style: imporve variable declaration
• fix: zoom on mobile (#104)
• refactor: replace jsvectormap.js with index.js