Release 2.1.3

Fixed

• Import-Module Plaster printed Plaster vX.Y.Z module loaded successfully on every import — the message was logged at
  Information level with -InformationAction Continue, so it
  displayed regardless of $env:PLASTER_LOG_LEVEL. Demoted it (and the
  symmetric "module is being removed" message) to Verbose so they are
  silent by default and surface only when PLASTER_LOG_LEVEL=Verbose
  (#470,
  closes #458)