feat: use toml-span for deserialization #555

Job	Run time
pre-commit	2m 43s
Cargo Machete	1m 0s
determine changes	5s
build binary \| linux x86_64	3m 13s
build binary \| macos aarch64	2m 49s
build binary \| macos x86_64	0s
build binary \| windows aarch64	4m 6s
build binary \| windows x86_64	3m 46s
cargo test \| ubuntu	5m 41s
cargo test \| macos aarch64	5m 7s
cargo test \| macos x86_64	0s
cargo test \| windows	7m 56s
cargo rustdoc \| ubuntu	3m 34s
cargo fmt \| ubuntu	16s
cargo clippy \| ubuntu	1m 43s
Pytest \| macos aarch64	2m 15s
Downstream tests \| macos aarch64	0s
Integration tests \| macos aarch64	0s
Wheel Tests \| macos aarch64 / Test Installation of Common Wheels \| macos-aarch64	1m 21s
Pytest \| linux x86_64	1m 9s
Integration tests \| linux x86_64	0s
Downstream tests \| linux x86_64	0s
Wheel Tests \| linux x86_64 / Test Installation of Common Wheels \| linux-x86_64	1m 44s
Pytest \| windows x86_64	5m 47s
Downstream tests \| windows x86_64	0s
Integration tests \| windows x86_64	0s
Wheel Tests \| windows x86_64 / Test Installation of Common Wheels \| windows-x86_64	2m 48s
	57m 3s

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