Fixed

• types: top level declaration, closes #459 (#462)
• Add guards for popperInstance (#567)
• don't include lodash in es build, closes #541
• licence, closes #331
• no component fade-in, closes #500
• tooltip: apply delay to self events, closes #428
• spread on string not working in IE, closes #323
• only put aria-describedby if open, closes #432

New

• ariaId, closes #379
• Expose isOpen in the popover slot (#507)