Update meta.yaml
Update meta.yaml

Replaced the string "python2.7/site-packages/"  to  "python3.7/site-packages" in order to make it compatible with code running in python3. 

Right now the code in python 3 most likely crashes because it is not able to replace the string the way it should.
cryoem/pydusa-feedstock,cryoem/pydusa-feedstock