detectseparation v0.4

New functionality

• detect_separation() can now distinguish between complete and quasi-complete separation when separation_type = TRUE in detect_separation_control().

Other improvements, updates and additions

• Documentation improvements.

• Updated CI workflow.

• detect_separation_control() does not infer the separator
  function, which is now done internally in
  .detect_infinite_estimates().

• Fixed typos in some internal variable names (thanks to Kasper Daniel Hansen).