LSSTDESC/qp: v0.8.4, various updates and fixes

<h2>What's Changed</h2> <ul> <li>Cleaning up docstrings by @delucchi-cmu in https://github.com/LSSTDESC/qp/pull/174</li> <li>Spruce up the README by @delucchi-cmu in https://github.com/LSSTDESC/qp/pull/179</li> <li>Add a new factory method read_metadata by @joezuntz in https://github.com/LSSTDESC/qp/pull/183</li> <li>Issue/186/fix readthedocs by @eacharles in https://github.com/LSSTDESC/qp/pull/187</li> <li>fix scipy wrapper to work with newer scipy by @eacharles in https://github.com/LSSTDESC/qp/pull/189</li> <li>Issue/178/metrics docs by @aimalz in https://github.com/LSSTDESC/qp/pull/181</li> <li>fix demo to refer to qp.read by @eacharles in https://github.com/LSSTDESC/qp/pull/194</li> <li>Move quant_pdf tests into their own test module by @drewoldag in https://github.com/LSSTDESC/qp/pull/195</li> <li>attempt to use copier template by @eacharles in https://github.com/LSSTDESC/qp/pull/197</li> <li>udpated to copier template v0.3.1 by @eacharles in https://github.com/LSSTDESC/qp/pull/198</li> <li>Implemented normalisation for weights with sum larger than one. Also … by @BStoelzner in https://github.com/LSSTDESC/qp/pull/185</li> </ul> <h2>New Contributors</h2> <ul> <li>@aimalz made their first contribution in https://github.com/LSSTDESC/qp/pull/181</li> <li>@BStoelzner made their first contribution in https://github.com/LSSTDESC/qp/pull/185</li> </ul> <p><strong>Full Changelog</strong>: https://github.com/LSSTDESC/qp/compare/v0.8.3...v0.8.4</p&gt

GalSim-developers/GalSim: Version 2.5.1

<p>Change log is here: https://github.com/GalSim-developers/GalSim/blob/v2.5.1/CHANGELOG.rst Full documentation is here: http://galsim-developers.github.io/GalSim/_build/html/index.html</p&gt

dfm/emcee: emcee v3.0.1

Added support for long double dtypes Prepared manuscript to submit to JOSS Improved packaging and release infrastructure Fixed bug in initial linear dependence tes