Update dependency typedoc to v0.28.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
typedoc (source)	0.28.3 -> 0.28.4

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Release Notes

TypeStrong/TypeDoc (typedoc)

v0.28.4

Compare Source

Features

• The navigation in the default theme will now attempt to break long names onto multiple lines, #​2940.
• Added German (de) localization, #​2941.

Bug Fixes

• TypeDoc's default theme now uses the same chevron for all collapsible elements, #​2924
  The chevronSmall helper is now deprecated and will be removed with v0.29.0.
• Classes/interfaces marked with @hidden will no longer appear in the
  "Hierarchy" section of the docs.
• TypeDoc now handles wildcard JSDoc types, #​2949.

Thanks!

• @​blutorange
• @​bkeepers

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