Update sqlite3 requirement from ~> 1.6.1 to ~> 2.1.0

Updates the requirements on [sqlite3](https://github.com/sparklemotion/sqlite3-ruby) to permit the latest version.
- [Release notes](https://github.com/sparklemotion/sqlite3-ruby/releases)
- [Changelog](https://github.com/sparklemotion/sqlite3-ruby/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/sqlite3-ruby@v1.6.1...v2.1.0)

---
updated-dependencies:
- dependency-name: sqlite3
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

anony.gemspec

@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "yard", "~> 0.9.20"
 
   # For integration testing
-  spec.add_development_dependency "sqlite3", "~> 1.6.1"
+  spec.add_development_dependency "sqlite3", "~> 2.1.0"
 
   if ENV["RAILS_VERSION"]
     spec.add_dependency "activerecord", "~> #{ENV['RAILS_VERSION']}"