Summary

fix #136

A name prop is now available for each series. This name will be used, if available, on every
legend or tooltip instead of the specId (used as fallback).

<BarSeries
    name={'Count'}
/>
<LineSeries
    name={'Count'}
/>
<AreaSeries
    name={'Count'}
/>

Checklist

Use strikethroughs to remove checklist items you don't feel are applicable to this PR.

• This was checked for cross-browser compatibility, including a check against IE11
• Proper documentation or storybook story was added for features that require explanation or tutorials
• Unit tests were updated or added to match the most common scenarios
• Each commit follows the convention