Add changelog (advances #7)

CHANGELOG.rst

+Change Log
+==========
+
+All notable changes to this project will be documented in this file.
+
+The format is based on `Keep a Changelog <http://keepachangelog.com/>`__
+and this project adheres to `Semantic
+Versioning <http://semver.org/>`__.
+
+0.5.0
+-----
+
+Added
+~~~~~
+
+-  Class method which gets the last week of a year
+
+Fixed
+~~~~~
+
+-  Fix year detection at year turns
+
+0.4.7
+-----
+
+Changed
+~~~~~~~
+
+-  Use default language from settings if language is not recognizable
+
+0.4.6
+-----
+
+Changed
+~~~~~~~
+
+-  Don't add encondings in i18n functions
+
+0.4.5
+-----
+
+Changed
+~~~~~~~
+
+-  Convert enums to lists for Django choices
+
+0.4.4
+-----
+
+Changed
+~~~~~~~
+
+-  Leave empty locale unchanged when normalising
+
+0.4.1
+-----
+
+Changed
+~~~~~~~
+
+-  Use system default encoding when normalising locale
+
+0.4.0
+-----
+
+Added
+~~~~~
+
+-  Normalise locales
+
+0.3.1
+-----
+
+Fixed
+~~~~~
+
+-  Fix a type cast for GET parameters
+
+0.3.0
+-----
+
+Added
+~~~~~
+
+-  Allow passing first day of week to i18n_js
+-  Allow passing locale to all functions
+
+Fixed
+~~~~~
+
+-  Fix bug in month_names that still had the dummy first element
+
+0.2.1
+-----
+
+Changed
+~~~~~~~
+
+-  Let JS function return a full script
+
+0.2.0
+-----
+
+Added
+~~~~~
+
+-  Functions for month names and abbreviationss
+-  JSON view for i18n
+
+0.1.1
+-----
+
+Added
+~~~~~
+
+-  Provide functions for tuples and enumerations in i18n module

pyproject.toml

@@ -7,6 +7,7 @@ license = "Apache-2.0"
 homepage = "https://edugit.org/AlekSIS/libs/python-calendarweek"
 repository = "https://edugit.org/AlekSIS/libs/python-calendarweek"
 documentation = "https://edugit.org/AlekSIS/libs/python-calendarweek"
+include = ["CHANGELOG.rst"]
 classifiers = [
     "Development Status :: 4 - Beta",
     "Framework :: Django",