To be able to customize ContextSet, move a subclass to evaluate.context

jedi/evaluate/dynamic.py

@@ -25,7 +25,7 @@ from jedi.evaluate import imports
 from jedi.evaluate.param import TreeArguments, create_default_params
 from jedi.evaluate.helpers import is_stdlib_path
 from jedi.evaluate.utils import to_list
-from jedi.common import ContextSet
+from jedi.evaluate.context import ContextSet
 from jedi.parser_utils import get_parent_scope