requirement for tests

Author: willmcgugan

appveyor.yml

@@ -19,7 +19,7 @@ environment:
 
 install:
   # We need wheel installed to build wheels
-  - "%PYTHON%\\python.exe -m pip install nose"
+  - "%PYTHON%\\python.exe -m pip install nose pyftpdlib mock"
   - "%PYTHON%\\python.exe setup.py install"
 
 build: off