Include optionality in AnyRegexOutput.Element.type #15

Job	Run time
Test / Linux (6.0 - jammy)	2m 4s
Test / Linux (nightly-6.2 - jammy)	2m 11s
Test / Linux (nightly-main - jammy)	1m 58s
Test / Linux (6.2 - jammy)	1m 50s
Test / Linux (6.1 - jammy)	2m 3s
Soundness / Documentation check	50s
Soundness / Unacceptable language check	0s
Soundness / Python lint check	7s
Test / Embedded Swift SDK for Wasm Build (${{ matrix.swift_version }} - ${{ matrix.os_version }})	0s
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	0s
Soundness / API breakage check	1m 25s
Soundness / Broken symlinks check	3s
Soundness / License headers check	7s
Soundness / YAML lint check	6s
Soundness / Shell check	38s
Test / Swift SDK for Wasm Build (${{ matrix.swift_version }} - ${{ matrix.os_version }})	0s
Test / Windows (${{ matrix.swift_version }} - windows-2022)	0s
Soundness / Format check	0s
Test / Static Linux Swift SDK Build (${{ matrix.swift_version }} - ${{ matrix.os_version }})	-5s
	13m 17s

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