Update to version 1.4

CHANGELOG.md

 # Changelog of pygeodyn
 
+1.4.0 - 2021-03-23
+------------------
+*Cdf data is now handled, P_bb covariance matrix is updated at each analysis, Huber norm is implemented for better results in presence of outliers*
+
 1.3.2 - 2020-04-01
 ------------------
 Skipped analyses now set misfits to NaN. This fixes the crash of `run_algo` when no observation was available in analysis steps.

pygeodyn/_version.py

-__version__ = '1.3.2'
\ No newline at end of file
+__version__ = '1.4.0'
\ No newline at end of file