v31.2.0

Full changelog

• General
  • Add rate limiting capabilities to the upload manager. (1543612, #974)
• Android
  • BUGFIX: baseline pings with reason "dirty startup" are no longer sent if Glean did not full initialize in the previous run (#996).
• Python
  • Support for Python 3.5 was dropped (#987).
  • Python wheels are now shipped with Glean release builds, resulting in much smaller libraries (#1002)
  • The Python bindings now use locale.getdefaultlocale() rather than locale.getlocale() to determine the locale (#1004).