Itur

Major Features
* We no longer guarantee compatibility of ITU-Rpy with python 2.7 - 3.5.

Minor Features And Improvements
* Fix code so it is compatible with latest version of `scipy` (>1.10.0).

Minor Features And Improvements
* Ensure attenuation values (gas, cloud, rain, scintillation) are always positive. Added a check to ensure that all values returned by the functions below are always positive (i.e., we cannot have a negative attenuation which will actually correspond to a gain):
* When computing the rain attenuation in ITU618, the computation of β had a bug that resulted in β=0 for lat <= 36 deg (missing equal sign).
* Added EPSILON, a small constant to prevent warning and errors when a) the model says that h_r < h_s, and b) the value of R001 = 0.

Reference to PRs
* Fix bug when computing β in ITU618 by inigodelportillo in https://github.com/inigodelportillo/ITU-Rpy/pull/61
* Ensure attenuation values (gas, cloud, rain, scintillation) are always positive by inigodelportillo in https://github.com/inigodelportillo/ITU-Rpy/pull/63


**Full Changelog**: https://github.com/inigodelportillo/ITU-Rpy/compare/0.3.2...0.3.4

Major Features And Improvements
* Fixed equation used in itur.models.itu453.radio_refractive_index
* Fix typos in equations for mid_latitude_temperature_summer
* Fix low/mid/high latitude pressure equations to use P10 and P72 values using the equations (instead that from standard_pressure)
Minor Features And Improvements
* Update documentation to fix typos
* Improved handling of warnings

Major Features And Improvements
* Add recommendation ITU-R P.1623
* Fix bugs in P676, P618, P.453, P840

Minor Features And Improvements
* Improved documentation for validation examples, add documentation for ITU-R P.1853

Major Features And Improvements
* Added [validation](https://itu-rpy.readthedocs.io/en/latest/validation.html#validation) results using ITU's provided example file
* Recommendations updated as of December 2019
* Incorporated latest available recommendations (e.g., ITU-R P.676-12, ITU-R P.840-8, ...)
* Reduced size of the package by moving from .txt data-files to .npz
* Added compatibility of the software with cartopy (as basemap is deprecated)
* Improved overall documentation

v.0.2.0
Release v.0.2.0

Major Features And Improvements

* Recommendations updated as of December 2017.
* Validation of routines using examples released on March 2018.
* Fully vectorized operations including all parameters (p, f, el).
* Test coverage > 80 %