mypy doesn't support typing.OrderedDict

What to do about this state of affairs?
```
? python -V && python -c "from typing import OrderedDict"                                                                         
Python 3.7.3
? mypy -V && mypy -c "from typing import OrderedDict"
mypy 0.710+dev.5f08ccf029aa3046b15e1afc60743ba692e4758d
<string>:1: error: Module 'typing' has no attribute 'OrderedDict'
```