Fix python tests

Author: fornwall

crates/python/run-tests.sh

@@ -10,10 +10,10 @@ export OSTYPE=linux
 . env/bin/activate
 pip install -r requirements.txt
 python setup.py develop
-python tests/test_solve.py
+PYTHONPATH=. python tests/test_solve.py
 
 # About to test cli
-OUTPUT=`echo 14 | ./env/bin/advent-of-code-py 2019 1 1`
+OUTPUT=`echo 14 | PYTHONPATH=. ./env/bin/advent-of-code-py 2019 1 1`
 if [ "${OUTPUT}" != 2 ]; then 
 	echo "Incorrect output: $OUTPUT"
 	exit 1