Log Message:
Update libpeas to 1.8.1

Switch to use python3. Now to update its consumers gedit, eog and rhythmbox.

Overview of Changes in libpeas 1.8.1
====================================
* Misc bugfixes

Overview of Changes in libpeas 1.8.0
====================================

* Misc bugfixes

* Translation updates:
  - Aragonese
  - Portuguese
  - Tadjik
  - Uyghur

Overview of Changes in libpeas 1.7.0
====================================

* Add python3 loader

* Translation updates:
  - Friulan
  - Kannada
  - Odia