Bump bigdecimal from 0.4.3 to 0.4.5 in /lang/rust

[dependabot]

Bumps bigdecimal from 0.4.3 to 0.4.5.

Release notes

Sourced from bigdecimal's releases.

v0.4.4

Changes

• Revert formatting semantics to match Rust's meanings rather than Python's
  • The meaning of the formatting string "{:.4}" has returned to "4 digits after decimal place" rather than "four digits of precision"
• Add new compile-time parameters for safer formatting
  • Configurable thresholds prevent printing out full decimal form of large numbers, like 1e999999999999999 (could be used in)
• Improved JSON serialization / formatting routines

[!NOTE] Please add your own tests to ensure this library formats (and continues to format) numbers as you expect

• Added methods

  • BigDecimalRef::clone_into
  • BigDecimal::set_scale (mutable version of take_and_scale)

• Optimized bigdecimal comparison algorithms

• Restricted versions of num-* crates to respect Minimum Supported Rust Version (1.43)

  • I may raise this up soon

Commits

• 369dfae v0.4.5
• 682343b Version 0.4.5
• 4c5ee5a Remove i686 test-job in gitlab-ci
• a439e79 Fix usize issues with 32-bit architecture
• 8f2936c Add i686 test-job to gitlab-ci
• dc70cca Replace more references of usize with u64 for 32-bit arch
• a64bdbf Fix digit counting for 32-bit arch in impl_fmt
• 570ed33 Standardize capitalization
• bee64e8 Remove invalid unwrap
• ed1757a Update .circleci to respect Cargo.lock
• Additional commits viewable in compare view

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