Defining \mathdefault command in latex preamble to avoid potential bug.

Closes #482

See merge request !781

Resolve "Add implementation of the UltraNest sampler"

Closes #456

See merge request !766

Resolve "Allow results to be returned as an ArviZ InferenceData object"

Closes #267

See merge request !772

Resolve "Double check `theta_jn` and `iota` consistency in the docs"

Closes #479

See merge request !777

- Don't add the initial point to the chain (prevents bad estimated of
  the act)
- Break strictly after maxmcmc and return a random draw from the prior

update waveform plot

See merge request !769

Reduce redundant code

See merge request !703

Add arviz to the testsuite docker files

See merge request !773

Add pre commits: flake8 and merge conflicts

See merge request !763

- Also applies Black for future inclusion

Fix mode array option

See merge request !765

Dirichlet priors

See merge request !632

Add ultranest to docker containers

See merge request !768

Update the default design sensitivity PSD

Closes #451

See merge request !757

Add hyperpe caching

See merge request !756

Catch signal error in dynesty

See merge request !742

updated iota to theta_jn in tutorials

See merge request !648

Resolve "Failure to create dynesty run plot at checkpoint"

Closes #476

See merge request !761

Resolve "Add multivariate gaussian to core likelihood"

Closes #455

See merge request !716

Improvement to pymultinest: allow long filenames

See merge request !764

Previously, the outdir and label where limited to 77 characters. This
bypasses the hard limit by creating a temporary symlink and then
transferring data to the target directory.

Resolve "Add Python 3.8 testing"

Closes #421

See merge request !762

Resolve "Matplotlib deprecation warning"

Closes #470

See merge request !760