Update Rust crate bitfield to 0.19

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
bitfield	dependencies	minor	0.16 -> 0.19

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Release Notes

dzamlo/rust-bitfield (bitfield)

v0.19.0

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Fixed

• Allow to specify an array of bools.

Breaking Changes

• If the type of an array field is exactly bool, then the Bit/BitMut traits are used instead of
  BitRange/BitRangeMut. In some very unlikely case where the traits are implemented manually, this may break
  existing code.

v0.18.1

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Fixed

• Don't use __bitfield_* macros from the code generated by the proc-macros. Otherwise, they need to be imported by
  the calling code.
• Allow mask, from and ìnto as getter names.

v0.18.0

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Fixed

• With the new proc macro implementation some corner-cases that were not handled are now handled correctly.

Breaking Changes

• The syntax to create a constructor by specifying individual fields has been removed.
• Some syntax that was supposed to be internal and implementation details are now rejected.

v0.17.0

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Breaking Changes

• Changes published as 0.16.2 (version now yanked) was breaking

v0.16.2

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Added

• Allow creating bitfield structs with arbitrary visibilities, thanks to @​ADSteele916

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