Update sqlite3 requirement from ~> 1.4 to ~> 2.5

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@v1.4.0...v2.5.0)

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

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

Gemfile

@@ -13,7 +13,7 @@ gemspec
 
 group :test do
   if ENV["DB"].nil? || ENV["DB"] == "sqlite"
-    gem "sqlite3", "~> 1.4"
+    gem "sqlite3", "~> 2.5"
   end
   gem "mysql2" if ENV["DB"] == "mysql"
   gem "pg", "~> 1.0" if ENV["DB"] == "postgresql"