BLD: update version number (mie-lab#489)

Merge branch 'master' of github.com:mie-lab/trackintel

increase version to 1.2.0

BLD: prepare for new release (mie-lab#461)

Update conf.py

ENH: add centroid method for angles (mie-lab#453)

* ENH: add centroid method for angles

* BUG: add missing index to centroid output

* BUG: Fix angle median bug for sp

* CLN: black

* CLN: give up and adapt test

* TST: Add test for planar crs

Update release

Update conf.py

Update conf.py

Update version number and added Nina as author