fix: expand coverage exclusion for py37

Author: taeold

.coveragerc-py37

@@ -12,14 +12,11 @@ omit =
 
 [report]
 exclude_lines =
-    # Have to re-enable the standard pragma
     pragma: no cover
-    
-    # Don't complain about async-specific imports and code
     from functions_framework.aio import
     from functions_framework._http.asgi import
     from functions_framework._http.gunicorn import UvicornApplication
-    
-    # Exclude async-specific classes and functions in execution_id.py
     class AsgiMiddleware:
-    def set_execution_context_async
+    def set_execution_context_async
+    return create_asgi_app_from_module
+    app = create_asgi_app\(target, source, signature_type\)