Bump ffi from 1.15.5 to 1.16.3

Bumps [ffi](https://github.com/ffi/ffi) from 1.15.5 to 1.16.3.
- [Changelog](https://github.com/ffi/ffi/blob/master/CHANGELOG.md)
- [Commits](ffi/ffi@v1.15.5...v1.16.3)

---
updated-dependencies:
- dependency-name: ffi
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -10,7 +10,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.5.0)
-    ffi (1.15.5)
+    ffi (1.16.3)
     rake (13.0.6)
     rgeo (2.3.0)
     rgeo-geojson (2.1.1)
@@ -28,7 +28,6 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.0)
-    webrick (1.7.0)
     yard (0.9.34)
     zeitwerk (2.6.9)