Use src as source directory

e08e02ed · Fabian Wachsmann · 9737db4c · e08e02ed · e08e02ed
Commit e08e02ed authored May 27, 2021 by Fabian Wachsmann
--- a/tzis/__init__.py
+++ b/tzis/__init__.py
--- a/tzis/tzis.py
+++ b/tzis/tzis.py