fix: restore coveragerc

.coveragerc

@@ -0,0 +1,35 @@
+[run]
+branch = 1
+cover_pylib = 0
+include=*mode/*
+omit = tests.*
+
+[report]
+omit =
+    */python?.?/*
+    */site-packages/*
+    */pypy/*
+
+    # tested by functional tests
+    */mode/loop/*
+
+    # not needed
+    */mode/types/*
+    */mode/utils/types/*
+    */mode/utils/mocks.py
+
+    # been in celery since forever
+    */mode/utils/graphs/*
+exclude_lines =
+    # Have to re-enable the standard pragma
+    if\ typing\.TYPE_CHECKING\:
+
+    pragma: no cover
+
+    if sys.platform == 'win32':
+
+    \@abc\.abstractmethod
+
+    \# Py3\.6
+
+    \@overload