Update sqlite3 requirement from ~> 1.6.0 to ~> 1.7.3

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@v1.6.0...v1.7.3)

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

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

Gemfile

@@ -30,4 +30,4 @@ gem 'rubocop-minitest'
 gem 'rubocop-rake'
 gem 'rubocop-rspec'
 gem 'simplecov'
-gem 'sqlite3', '~> 1.6.0' unless is_jruby
+gem 'sqlite3', '~> 1.7.3' unless is_jruby