v1.7.0

• Add support for Kibana 7.5
• Use new Kibana 7.5 icons for computed columns
• Upgrade to expr-eval 2.0, that brings new features in computed columns:
  • Ability to reference arrays. Especially useful to reference a 'Top Hits' metric column: col1[0]
  • New functions for arrays available: join, map, filter
  • Variable assignment: x = 4
  • Custom function definitions: myfunction(x, y) = x * y
  • Evaluate multiple expressions by separating them with ;
• Add sort and uniq functions in computed columns: sort(uniq(col['top hits']))
• Computed cols: indexOf and lastIndexOf functions now support both string or array parameter
• Externalize data loading from rendering => no more blink effect in Kibana 7.2+ (fix issue #73)