Update Rust crate num-traits to 0.2.19 - autoclosed

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
num-traits	dependencies	patch	0.2.15 -> 0.2.19

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Release Notes

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

v0.2.19

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• Upgrade to 2021 edition, MSRV 1.60
• The new Float::clamp limits values by minimum and maximum

Contributors: @​cuviper, @​michaelciraci

v0.2.18

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• The new Euclid::div_rem_euclid and CheckedEuclid::checked_div_rem_euclid methods
  compute and return the quotient and remainder at the same time.
• The new TotalOrder trait implements the IEEE 754 totalOrder predicate.
• The new ConstZero and ConstOne traits offered associated constants,
  extending the non-const Zero and One traits for types that have constant values.

Contributors: @​andrewjradcliffe, @​cuviper, @​tarcieri, @​tdelabro, @​waywardmonkeys

v0.2.17

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• Fix a doc warning about custom classes with newer rustdoc.

Contributors: @​robamu

v0.2.16

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• 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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