Sourced from bigdecimal's changelog.

3.1.9

• Accept no digits in the fractional part (#302)

  @​kou

• a015c8b CI: Disable benchmarking of some versions on Ruby
• 8bdeafc Bump up to v3.1.9
• 480dd79 CHANGES: Add v3.1.9 entries
• 66868ab Accept no digits in the fractional part (#302)
• de0634c Merge pull request #305 from nobu/c2x-pedantic
• 5f9466a Fix extra semicolon outside of a function in NO_SANITIZE
• 996c51b Merge pull request #296 from franzliedke/patch-1
• ad4fec6 Merge pull request #303 from nobu/extconf
• 8fa7712 Reduce unnecessary checks
• 33b5374 Merge pull request #299 from anakinj/minimal-typo-fix
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