chore(deps): update rust crate num-traits to 0.2.16

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
num-traits	workspace.dependencies	patch	0.2.15 -> 0.2.16

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Release Notes

rust-num/num-traits (num-traits)

v0.2.16

Compare Source

• Upgrade to 2018 edition, MSRV 1.31
• The new ToBytes and FromBytes traits convert to and from byte
  representations of a value, with little, big, and native-endian options.
• The new Float::is_subnormal method checks for subnormal values, with
  a non-zero magnitude that is less than the normal minimum positive value.
• Several other improvements to documentation and testing.

Contributors: @​ctrlcctrlv, @​cuviper, @​flier, @​GuillaumeGomez, @​kaidokert,
@​rs017991, @​vicsn

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