Adding upstream version 4.5.0+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tox.ini

@@ -0,0 +1,22 @@
+[tox]
+envlist = py,pre-commit
+
+[testenv]
+deps = -rrequirements-dev.txt
+setenv =
+    GIT_AUTHOR_NAME = "test"
+    GIT_COMMITTER_NAME = "test"
+    GIT_AUTHOR_EMAIL = "test@example.com"
+    GIT_COMMITTER_EMAIL = "test@example.com"
+commands =
+    coverage erase
+    coverage run -m pytest {posargs:tests}
+    coverage report
+
+[testenv:pre-commit]
+skip_install = true
+deps = pre-commit
+commands = pre-commit run --all-files --show-diff-on-failure
+
+[pep8]
+ignore=E265,E501,W504