ARC version 2.0.3

This version corrects returned coordinate mesh in the region where the wavefunction is calculated 0. This seems unimportant, but it corrects observable numerical inaccuracy in dme calculations by improving integration by trapezoidal rule.

In other words, if you have been calculating dipole matrix elements for high orbital angular momentum states (\ell approaching n-1), please install this update (with pip update), remove saved old dipole matrix elements (delete .arc-data hidden folder in your home directory) and enjoy better precision of high \ell dme values.