Update sqlite3 requirement from ~> 1.4 to ~> 2.0

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@v1.4.0...v2.0.1)

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

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

Gemfile

@@ -19,7 +19,7 @@ platforms :ruby do
   elsif ENV['DB'] == 'postgres'
     gem 'pg'
   else
-    gem 'sqlite3', '~> 1.4'
+    gem 'sqlite3', '~> 2.0'
   end
 end