title: Bulk update via raw query in TypeORM
body: <p>How can I do bulk update via raw query in TypeORM?<br>
  For example we have model <em>User</em> with property <em>name</em><br>
  How can I change names of few users in one transaction? <br></p>
  <p>typeorm version: <strong>0.2.7</strong><br>
  database: <strong>postgress</strong></p>