Release 7.4.1

This release solves the BC break issues introduced in 7.4.0.

• We added the suppress operator @ for the deprecation messages @trigger_error().
  With this approach we don't break existing application that convert PHP errors in Exception
  (e.g. using Laravel with issue https://github.com/babenkoivan/scout-elasticsearch-driver/issues/297).
  Using the @ operator is still possible to intercept the deprecation message using a custom error handler.
  #973
• Add missing leading slash in the URL of put mapping endpoint
  #970
• Fix pre 7.2 endpoint class name with aliases + reapply fix #947.
  This PR solved the unexpected BC break introduce in 7.4.0 with the code generation tool
  #968