removed ftol in favor of tol. Added it to leas squares to keep same f…

[PaulJonasJost]

removed ftol from script optimizer options as many solvers are not able to make use of it. Instead used tol.

[codecov-commenter]

Codecov Report

Merging #803 (523ab5b) into develop (160c2a8) will decrease coverage by 44.06%.
The diff coverage is 39.92%.

@@             Coverage Diff              @@
##           develop     #803       +/-   ##
============================================
- Coverage    88.16%   44.10%   -44.07%     
============================================
  Files           79      106       +27     
  Lines         5257     7269     +2012     
============================================
- Hits          4635     3206     -1429     
- Misses         622     4063     +3441     

Impacted Files	Coverage Δ
pypesto/engine/mpi_pool.py	0.00% <0.00%> (ø)
pypesto/engine/task.py	100.00% <ø> (ø)
pypesto/objective/aesara.py	0.00% <0.00%> (ø)
pypesto/sample/adaptive_parallel_tempering.py	30.43% <0.00%> (-65.22%)	⬇️
pypesto/sample/auto_correlation.py	9.09% <0.00%> (-86.37%)	⬇️
pypesto/sample/diagnostics.py	23.07% <ø> (-46.16%)	⬇️
pypesto/sample/emcee.py	28.30% <ø> (ø)
pypesto/sample/geweke_test.py	14.08% <ø> (-80.29%)	⬇️
pypesto/sample/metropolis.py	26.31% <ø> (-71.06%)	⬇️
pypesto/sample/parallel_tempering.py	23.61% <ø> (-70.76%)	⬇️
... and 159 more

---

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[yannikschaelte]

I would change to tol: float = None in l. 270 too. @FFroehlich opinions?

[FFroehlich]

I would change to tol: float = None in l. 270 too. @FFroehlich opinions?

sounds good