feat(#71): add getRelated() method

[Decipher]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

• Added getRelated() method to the DruxtClient

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

Screenshots/Media:

[changeset-bot]

🦋 Changeset detected

Latest commit: 9b51fb5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 10 packages

Name	Type
druxt	Minor
druxt-blocks	Patch
druxt-breadcrumb	Patch
druxt-entity	Patch
druxt-menu	Patch
druxt-router	Patch
druxt-schema	Patch
druxt-site	Patch
druxt-test-utils	Major
druxt-views	Patch

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[codecov]

Codecov Report

Merging #202 (9b51fb5) into develop (c7b267a) will increase coverage by 0.08%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #202      +/-   ##
===========================================
+ Coverage    96.59%   96.67%   +0.08%     
===========================================
  Files           89       89              
  Lines         2820     2831      +11     
  Branches       594      596       +2     
===========================================
+ Hits          2724     2737      +13     
+ Misses          85       84       -1     
+ Partials        11       10       -1     

Impacted Files	Coverage Δ
packages/druxt/src/client.js	94.73% <ø> (+1.29%)	⬆️
packages/router/src/router.js	100.00% <0.00%> (+0.98%)	⬆️

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