Merge branch 'refactor' into 'master'

Refactoring proposals

See merge request uhlmann-group/python-spline-fitting-toolbox!3
1 job for master in 5 minutes and 36 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #395654
tests

00:05:36

 
Name Stage Failure
failed
tests Test
ERROR tests/test_surface.py
!!!!!!!!!!!!!!!!!!! Interrupted: 3 errors during collection !!!!!!!!!!!!!!!!!!!!
============================== 3 errors in 9.98s ===============================
Uploading artifacts for failed job
Uploading artifacts...
WARNING: coverage.xml: no matching files
ERROR: No files to upload
Cleaning up file based variables
ERROR: Job failed: exit code 1