Add missing macOS dependencies to Brewfile, update README.md #114

Job	Run time
Test / Linux (5.10 - jammy)	3m 2s
Test / Linux (6.0 - jammy)	2m 58s
Test / Linux (6.1 - jammy)	2m 52s
Test / Linux (nightly-6.2 - jammy)	3m 39s
Test / Linux (5.9 - jammy)	2m 40s
Test / Linux (nightly-main - jammy)	3m 51s
Soundness / Documentation check	38s
Soundness / License headers check	4s
Soundness / Unacceptable language check	3s
Soundness / Broken symlinks check	5s
Soundness / Format check	37s
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	0s
Test / Linux Static SDK Build (${{ matrix.swift_version }} - ${{ matrix.os_version }})	0s
Soundness / YAML lint check	6s
Soundness / Python lint check	7s
Soundness / Shell check	32s
Test / Windows (${{ matrix.swift_version }} - windows-2022)	0s
Soundness / API breakage check	0s
Test / Wasm SDK Build (${{ matrix.swift_version }} - ${{ matrix.os_version }})	0s
	21m 14s

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