FG21sim: v0.6.5

* Improve the turbulence velocity dispersion calculation.

* Fix the dropout bug when using dumped halos data.

* Add more methods to help iterate merger trees.

* Change the cluster catalog from Pandas DataFrame to a list of dictionaries,
  which is similar to the halos data, preparing the support to exploit all
  traced merger events when simulation the radio halos.

* Various other updates and cleanups.
-----BEGIN PGP SIGNATURE-----
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=sUGd
-----END PGP SIGNATURE-----