Update Rust crate bigdecimal to v0.4.2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
bigdecimal	dependencies	patch	=0.4.1 -> =0.4.2

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Release Notes

akubera/bigdecimal-rs (bigdecimal)

v0.4.2

Compare Source

Changes

• Add Context struct

  • For user-controlled precision and rounding
  • Support for a few BigDecimal functions added (eg: sqrt_with_context(&self, ctx: &Context)) , more to come in future versions.
  • Note standard operations use default (compile-time-defined) context

• Add BigDecimalRef struct

  • Non-owning BigDecimal struct that has some non-digit-changing methods (i.e. change sign/scale without copying digits) for more efficient calculations
  • Implements math operations Add,Sub
  • Implement From<&BigInt> for BigDecimalRef

• Compile-time default rounding mode may be set by environment variable RUST_BIGDECIMAL_DEFAULT_ROUNDING_MODE

• Fix issue recompiling if RUST_BIGDECIMAL_DEFAULT_PRECISION haddn't changed

• Add BigDecimal::with_precision_round()

  • trim the bigdecimal after operations, rounding at given point

• Add BigDecimal::fractional_digit_count()

  • Return's the bigdecimal's "scale", (number of digits right of the decimal point)

• Support reading subnormal floating-point numbers

• Improve initial "guess" in calculation of inverted value.

• Fix panic in from_str_radix (#​115)

• (internal) Reorganize std::ops implementations by moving each to separate functions (src/impl_ops_add.rs, src/impl_ops_sub.rs, etc)

Performance Improvements

• BigDecimal::eq takes into account trailing zeros, avoids aligning digits
• (internal) ten_to_the - used everywhere to align BigIntegers within BigDecimals, all operations with high precision numbers should be faster

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[Turbo87]

hmm... a changelog would be nice... seems like quite a lot of random changes for a patch release :-/

[Turbo87]

changelog has been updated :)