This is a maintenance release. Users of 0.34 can skip this update.

• Chg : uvar magic used to be enabled for 5.9.5. It now requires 5.10 or
  later.
  
• Fix : Silence compilation warnings for cxinc().
  
• Rem : The workaround introduced in 0.31 for the "Unknown errors" issue
  was removed, as regression tests show that 0.34 provides a
  better fix.
  
• Tst : Skip t/40-threads.t on 5.8.x with old versions of threads and
  threads::shared.