Update sqlite3 requirement from ~> 1.3.6 to ~> 1.4.2

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/master/CHANGELOG.rdoc)
- [Commits](sparklemotion/sqlite3-ruby@v1.3.6...v1.4.2)

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

calagator.gemspec

@@ -64,7 +64,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'selenium-webdriver'
   s.add_development_dependency 'webdrivers'
   s.add_development_dependency 'simplecov', '~> 0.16'
-  s.add_development_dependency 'sqlite3', '~> 1.3.6'
+  s.add_development_dependency 'sqlite3', '~> 1.4.2'
   s.add_development_dependency 'sunspot_solr', '~> 2.1'
   s.add_development_dependency 'timecop', '~> 0.7.1'
   s.add_development_dependency 'uglifier', '>= 1.3.0'