Added CHANGELOG and towncrier-setup

CHANGELOG

+Changelog
+=========
+
+.. towncrier

changes/changelog.d/initial.feature

+Created the project and initial functionality.
\ No newline at end of file

changes/notes.rst

+Next release notes
+==================
+
+.. note::
+
+    Those release notes refer to the current development branch and are reset
+    after each release.

changes/template.rst

+Upgrade via pip.
+
+{% for section, _ in sections.items() %}
+{% if sections[section] %}
+{% for category, val in definitions.items() if category in sections[section]%}
+{{ definitions[category]['name'] }}:
+
+{% if definitions[category]['showcontent'] %}
+{% for text in sections[section][category].keys()|sort() %}
+- {{ text }}
+{% endfor %}
+
+{% else %}
+- {{ sections[section][category]['']|join(', ') }}
+
+{% endif %}
+{% if sections[section][category]|length == 0 %}
+No significant changes.
+
+{% else %}
+{% endif %}
+
+{% endfor %}
+{% else %}
+No significant changes.
+
+{% endif %}
+{% endfor %}

pyproject.toml

+[tool.towncrier]
+    package = "changes"
+    package_dir = ""
+    filename = "CHANGELOG"
+    directory = "changes/changelog.d/"
+    start_string = ".. towncrier\n"
+    template = "changes/template.rst"
+    issue_format = ""
+    title_format = "{version} (unreleased)"
+    underlines = "-"
+
+    [[tool.towncrier.section]]
+        path = ""
+
+    [[tool.towncrier.type]]
+        directory = "feature"
+        name = "Features"
+        showcontent = true
+
+    [[tool.towncrier.type]]
+        directory = "enhancement"
+        name = "Enhancements"
+        showcontent = true
+
+    [[tool.towncrier.type]]
+        directory = "bugfix"
+        name = "Bugfixes"
+        showcontent = true
+
+    [[tool.towncrier.type]]
+        directory = "doc"
+        name = "Documentation"
+        showcontent = true
+
+    [[tool.towncrier.type]]
+        directory = "i18n"
+        name = "i18n"
+        showcontent = true
+
+    [[tool.towncrier.type]]
+        directory = "misc"
+        name = "Other"
+        showcontent = true
+
+[tool.black]
+    exclude = "(.git|.hg|.mypy_cache|.tox|.venv|_build|buck-out|build|dist|migrations)"

setup.cfg

@@ -71,6 +71,9 @@ build-pypi =
 publish =
     twine~=3.4.1
 
+changelog =
+    towncrier~=21.3.0
+
 [options.packages.find]
 exclude =
     tests