Update to latest version of popit-api
Update to latest version of popit-api

This incorporates the fix for elasticsearch timing out after bulk
requests.

mysociety/popit,mysociety/popit,Sinar/popit,openstate/popit,Sinar/popit,Sinar/popit,mysociety/popit,mysociety/popit,openstate/popit,openstate/popit,mysociety/popit,openstate/popit,Sinar/popit