Update dependency typedoc to v0.20.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
typedoc (source)	0.20.2 -> 0.20.3

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Release Notes

TypeStrong/TypeDoc

### [`v0.20.3`](https://togithub.com/TypeStrong/TypeDoc/releases/v0.20.3) [Compare Source](https://togithub.com/TypeStrong/TypeDoc/compare/v0.20.2...v0.20.3) ##### Features - Improved support for global files ([5882e44](https://togithub.com/TypeStrong/TypeDoc/commit/5882e44f43814cb2d9addeb88e5470d6439f7cb9)), closes [#​1424](https://togithub.com/TypeStrong/TypeDoc/issues/1424)

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[codecov[bot]]

Codecov Report

Merging #339 (b05ce92) into master (6cb0c3a) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #339   +/-   ##
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  Coverage   90.00%   90.00%           
=======================================
  Files           1        1           
  Lines          10       10           
=======================================
  Hits            9        9           
  Misses          1        1           

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