Skip coverage for live server

Unfortunately those tests are skipped on Windows, which skews code coverage stats.

Author: nicoddemus

src/pytest_flask/fixtures.py

@@ -40,7 +40,7 @@ def test_login(self):
 
 
 @pytest.fixture(scope=_determine_scope)
-def live_server(request, app, pytestconfig):
+def live_server(request, app, pytestconfig):  # pragma: no cover
     """Run application in a separate process.
 
     When the ``live_server`` fixture is applied, the ``url_for`` function

src/pytest_flask/live_server.py

@@ -14,7 +14,7 @@
     multiprocessing = multiprocessing.get_context("fork")
 
 
-class LiveServer:
+class LiveServer:  # pragma: no cover
     """The helper class used to manage a live server. Handles creation and
     stopping application in a separate process.