Unittest crashes

**Steps to reproduce**

1. Make a fresh clone
2. Set up a virtual environment
3. pip install -r requirements-dev.txt
4. python -m unittest

**Observed result**
Crashes with incompatible api calls

**Expected result**
Failures, but no crashes.

**Workaround**
Update requirements.txt to specify factoriocalc==0.2.1
This will solve some of the issues, but not all.