feat: allow partial custom domain

[emmacunningham]

Summary

re #111

This PR adds the enhancement to defining partially bounded custom domains. Where DomainRange was previously typed as { min: number, max: number }, it now is typed as such:

export type DomainRange = LowerBoundedDomain | UpperBoundedDomain | CompleteBoundedDomain;

export interface LowerBoundedDomain {
  min: number;
}

export interface UpperBoundedDomain {
  max: number;
}

export interface CompleteBoundedDomain {
  min: number;
  max: number;
}

This allows us to flexibly extend the interfaces as needed and also enforce that at least one of max and min are defined (while providing the downstream user with feedback on the type of their config to block {} as a valid prop). [The other benefit to this type is that internally, we can refer to the individual types of bounded domains and use them in a typeguard; see the updated mergeDomainsByGroupId implementation. Additionally, we can use the typeguards when merging X and Y domains.]

For a partial custom domain, we also check its validity (for example, a LowerBoundedDomain should not have a min greater than the max of the computed domain). Currently this throws, but per #117, once there is an agreement on error handling, this may change.

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 #116 into master will increase coverage by 0.23%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #116      +/-   ##
==========================================
+ Coverage   90.17%   90.41%   +0.23%     
==========================================
  Files          31       31              
  Lines        1405     1439      +34     
  Branches      150      161      +11     
==========================================
+ Hits         1267     1301      +34     
  Misses        125      125              
  Partials       13       13

Impacted Files	Coverage Δ
src/lib/series/specs.ts	100% <ø> (ø)	⬆️
src/lib/series/domains/y_domain.ts	100% <100%> (ø)	⬆️
src/lib/series/domains/x_domain.ts	100% <100%> (ø)	⬆️
src/lib/axes/axis_utils.ts	100% <100%> (ø)	⬆️

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[emmacunningham]

@markov00 using the typeguards instead of casting as Partial<CompleteBoundedDomain>, see fbbe316

[markov00]

Code LGTM

[markov00]

🎉 This PR is included in version 3.4.0 🎉

The release is available on:

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

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