New Features

frites.conn.conn_links now accepts to use brain region names as source or target seeds (8d7e1fb)
New function frites.stats.confidence_interval for computing confidence intervals, standard deviation (sd) and standard error on the mean (sem) on numpy arrays and xarray DataArray (3a51253)
New plotting module with two functions for plotting connectivity matrices, frites.plot.plot_conn_heatmap and frites.plot.plot_conn_circle (7a107d1, a480371, 33930cc, 24029c4)
Add the possibility to control the node's size in frites.plot.plot_conn_circle (7454376)
Add support for signed connectivity and improve node control of frites.plot.plot_conn_circle (78bbb91)

Bug fixes

Fix parallel computing of frites.conn.conn_covgc (f2ff5f6)
Use linearly spaced indices instead of closest time points in frites.conn.define_windows (b5443ac)
frites.conn.conn_spec average over tapers after computing connectivity metric (10966a1).Thanks to @adam2392 and @ruuskas from the mne-connectivity package.