Allow axis titles to wrap text

[marshallpete]

Provide a general summary of the feature here

Axis titles are sometimes longer than the width of the chart. Would be nice to be able to break an axis title up into multiple lines.

🤔 Expected Behavior?

When title on an Axis is an array of strings, display each string on a new line. This is supported by Vega https://vega.github.io/vega/docs/axes/ (see title in props)

💁 Possible Solution

Update the type for title on Axis to support string | string[]. If it is an array, each string should be displayed on a new line.

🔦 Context

Axis title that is wider than the chart.

💻 Examples

No response

🧢 Your Company/Team

Adobe/Workfront

[marshallpete]

Fixed with above PR