Bump bigdecimal from 3.3.1 to 4.0.0 (#185)

Bumps [bigdecimal](https://github.com/ruby/bigdecimal) from 3.3.1 to 4.0.0.
- [Release notes](https://github.com/ruby/bigdecimal/releases)
- [Changelog](https://github.com/ruby/bigdecimal/blob/master/CHANGES.md)
- [Commits](ruby/bigdecimal@v3.3.1...v4.0.0)

---
updated-dependencies:
- dependency-name: bigdecimal
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -12,7 +12,7 @@ GEM
       execjs (~> 2)
     backports (3.24.1)
     base64 (0.3.0)
-    bigdecimal (3.3.1)
+    bigdecimal (4.0.0)
     borrower (0.10.0)
     coffee-script (2.4.1)
       coffee-script-source