Include optionality in AnyRegexOutput.Element.type #13

Job	Run time
Test / Linux (nightly-main - jammy)	2m 20s
Test / Linux (nightly-6.2 - jammy)	2m 20s
Test / Linux (6.1 - jammy)	2m 1s
Test / Linux (6.0 - jammy)	2m 14s
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	-1s
Test / Windows (${{ matrix.swift_version }} - windows-2022)	-1s
Test / Embedded Swift SDK for Wasm Build (${{ matrix.swift_version }} - ${{ matrix.os_version }})	-1s
Test / Static Linux Swift SDK Build (${{ matrix.swift_version }} - ${{ matrix.os_version }})	-1s
Soundness / License headers check	8s
Soundness / Broken symlinks check	4s
Soundness / Documentation check	52s
Soundness / Format check	4s
Soundness / Unacceptable language check	4s
Soundness / API breakage check	1m 40s
Soundness / Shell check	45s
Soundness / YAML lint check	4s
Soundness / Python lint check	9s
Test / Swift SDK for Wasm Build (${{ matrix.swift_version }} - ${{ matrix.os_version }})	-7s
	12m 34s

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