feat: allow optional lists and maps #1

Job	Run time
build-vscode-release / build	9m 29s
build-ruby-release / x86_64-linux	16m 40s
build-typescript-release / aarch64-apple-darwin	7m 1s
build-python-release / x86_64-unknown-linux-gnu	8m 56s
build-ruby-release / x86_64-linux-musl	17m 19s
build-typescript-release / aarch64-unknown-linux-gnu	13m 45s
build-ruby-release / aarch64-linux	16m 46s
build-typescript-release / x86_64-apple-darwin	7m 12s
build-python-release / aarch64-unknown-linux-gnu	9m 2s
build-ruby-release / aarch64-linux-musl	17m 10s
build-typescript-release / x86_64-pc-windows-msvc	16m 26s
build-python-release / x86_64-unknown-linux-musl	8m 32s
build-ruby-release / arm-linux	17m 9s
build-typescript-release / x86_64-unknown-linux-gnu	7m 29s
build-python-release / aarch64-unknown-linux-musl	9m 26s
build-ruby-release / arm64-darwin	16m 46s
build-typescript-release / x86_64-unknown-linux-musl	7m 59s
build-python-release / x86_64-apple-darwin	8m 1s
build-python-release / aarch64-apple-darwin	9m 26s
build-typescript-release / aarch64-unknown-linux-musl	9m 3s
build-python-release / x86_64-pc-windows-msvc	15m 35s
Assert all builds passed	1s
publish-to-github	0s
publish-to-pypi	0s
publish-to-npm	0s
publish-to-open-vsx	0s
publish-to-rubygems	0s
publish-to-vscode-marketplace	0s
	4h 9m 13s

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