feat(domain): scale data to a specific domain via axis spec

[emmacunningham]

Summary

close #86

This PR introduces the feature to specify custom domains for a series. There are two types of domains to customize: xDomain and yDomains.

xDomain

xDomain is configured via the Settings spec because the xDomain is shared globally and so the user should only be able to configure one xDomain.

• For ordinal domains, the user will define an array of values. (If they include values that aren't in the data, these will just appear as gaps.) The order of the values will be how they appear along the axis.

• For other domain types, the user supplies a domain with min & max.
  

yDomains

yDomains are configured per axis/group.

• If a domain is supplied for an axis that is an xDomain axis, an error will be thrown, letting the user know that this should be added through the Settings spec.

• If a user specifies multiple domains for the same group (which can be done when having multiple axes), then the domains are merged to cover the largest range of the supplied domains (e.g. if { min: 0, max: 5 } and { min: 1, max: 15 } are provided as the domains for the same group, then the merged domain applied would be { min : 0, max: 15 })

Also, to allow the user to specify a custom domain but not show the axis, we implement the hide feature.

Custom domain w/ hidden axis:

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

[codecov-io]

Codecov Report

Merging #98 into master will increase coverage by 0.22%.
The diff coverage is 95.65%.

@@            Coverage Diff             @@
##           master      #98      +/-   ##
==========================================
+ Coverage   88.63%   88.86%   +0.22%     
==========================================
  Files          28       28              
  Lines        1144     1167      +23     
  Branches      118      119       +1     
==========================================
+ Hits         1014     1037      +23     
+ Misses        120      119       -1     
- Partials       10       11       +1

Impacted Files	Coverage Δ
src/lib/series/specs.ts	100% <ø> (ø)	⬆️
src/state/utils.ts	72.72% <100%> (ø)	⬆️
src/lib/axes/axis_utils.ts	99.51% <100%> (+0.01%)	⬆️
src/lib/series/domains/x_domain.ts	100% <100%> (ø)	⬆️
src/lib/series/domains/y_domain.ts	98.41% <100%> (+1.69%)	⬆️
src/state/chart_state.ts	98.94% <100%> (ø)	⬆️
src/lib/utils/dimensions.ts	76.92% <100%> (+2.41%)	⬆️
src/lib/series/rendering.ts	40.42% <75%> (+3.84%)	⬆️

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[markov00]

Code LGTM, tested locally.
I've left few minor comments on code.

[markov00]

Changes after review LGTM.

[markov00]

🎉 This PR is included in version 3.2.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

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