Fix coverage

{{cookiecutter.project_slug}}/.coveragerc

 [run]
-source = km3io
+source = {{cookiecutter.project_slug}}
 
 [report]
 include =
-    km3io/*
+    {{cookiecutter.project_slug/*
 omit =
     tests/*
-    km3io/definitions/*
-    km3io/version.py
+    {{cookiecutter.project_slug/version.py
 exclude_lines =
     pragma: no cover
     raise AssertionError