2.38.1

 * Fix User.verify to convert uid to string (phairow)
 * Configure Travis CI to cache phantomjs binaries (Miroslav Bajtoš)
 * Improve "filter" arg description (Raymond Camden)
 * Fix creation of verification links (Miroslav Bajtoš)
 * Include link to docs in logoutSessions warning (Miroslav Bajtoš)
 * Fix detection of logoutSessionsOnSensitiveChanges (Miroslav Bajtoš)
 * Preserve sessions on User.save() making no changes (Miroslav Bajtoš)
 * Remove unused dependencies (Miroslav Bajtoš)
 * Fix logout to handle no or missing accessToken (Ritchie Martori)
 * Use English when running Mocha tests (Miroslav Bajtoš)
 * Role model: resolves related models by name (Benjamin Kroeger)
 * Fix User methods to use correct Primary Key (Aris Kemper)
