Update dependency typedoc to v0.20.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
typedoc (source)	0.20.0 -> 0.20.4

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Release Notes

TypeStrong/TypeDoc

v0.20.4

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Bug Fixes

• --excludeNotDocumented didn't remove reflections (5ebbd0f), closes #​1435

v0.20.3

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Features

• Improved support for global files (5882e44), closes #​1424

v0.20.2

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Bug Fixes

• ArgumentsReader should warn if missing a value (02b915d), closes #​1429
• Literal boolean converter in TS 3 (ed67eda), closes #​1432
• Map bash, sh, shell to shellscript when highlighting (6eb6c28), closes #​1432
• Negative literal types were converted incorrectly (c14b5b5), closes #​1427
• TS 3 converters for null, this types (20febfd)

Features

• Better detection for declaration files defining a module (38d8edf), closes #​1430

v0.20.1

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Bug Fixes

• Initializers should only be included if "simple" (5bf4d05), closes #​1288 #​1224 #​764

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