Fix most import related mypy errors

jedi/inference/value/__init__.py

@@ -4,3 +4,18 @@ from jedi.inference.value.function import FunctionValue, \
     MethodValue
 from jedi.inference.value.instance import AnonymousInstance, BoundMethod, \
     CompiledInstance, AbstractInstanceValue, TreeInstance
+
+__all__ = (
+    'ModuleValue',
+
+    'ClassValue',
+
+    'FunctionValue',
+    'MethodValue',
+
+    'AnonymousInstance',
+    'BoundMethod',
+    'CompiledInstance',
+    'AbstractInstanceValue',
+    'TreeInstance',
+)

jedi/inference/value/instance.py

@@ -1,6 +1,6 @@
 from abc import abstractproperty
 
-from parso.python.tree import search_ancestor
+from parso.tree import search_ancestor
 
 from jedi import debug
 from jedi import settings