updated tox commands

Author: glichtner

tox.ini

@@ -8,8 +8,9 @@ deps=
   -rrequirements.txt
   tifffile
   pytest
+  build
 
 commands=
-  python setup.py build_ext --inplace
-  python setup.py install
+  python -m build
+  pip install .
   pytest {posargs:}