1.2.0

This new release introduces several bug-fixes and miscellaneous features:

• There is a new function get_energy_spread that returns the energy spread of the beam. This is partially redundant with get_mean_gamma, which is kept for backward compatibility. (see #304 and #317)

• The 3D field reconstruction from ThetaMode data now has an option max_resolution_3d that limits the resolution of the final 3D array. This is added in order to limit the memory footprint of this array. (see #307) The 3D reconstruction is now also more accurate, thanks to the implementation of linear interpolation. (see #311)

• A bug that affected reading ThetaMode data with the openpmd-api backend has been fixed. (see #313)

• A bug that affected get_laser_waist has been fixed. (see #320)