add py3 version to zipimport (#305)

stdlib/2and3/zipimport.pyi

@@ -0,0 +1,19 @@
+"""Stub file for the 'zipimport' module."""
+
+from typing import Optional
+from types import CodeType, ModuleType
+
+class ZipImportError(ImportError): ...
+
+class zipimporter(object):
+    archive = ...  # type: str
+    prefix = ...  # type: str
+    def __init__(self, archivepath: str) -> None: ...
+    def find_module(self, fullname: str, path: str = ...) -> Optional[zipimporter]: ...
+    def get_code(self, fullname: str) -> CodeType: ...
+    def get_data(self, pathname: str) -> str: ...
+    def get_filename(self, fullname: str) -> str: ...
+    def get_source(self, fullname: str) -> Optional[str]: ...
+    def is_package(self, fullname: str) -> bool: ...
+    def load_module(self, fullname: str) -> ModuleType: ...
+