try update requierments to fix heroku
update numpy version
remove pandas temporarily for heroku
Revert "remove pandas temporarily for heroku"

This reverts commit 935f96a9b878efa0623b20e76100dad0bb07c009.
Revert "Revert "remove pandas temporarily for heroku""

This reverts commit 3de4ef5ec0cc7906ac7677fed859405d49565d02.
Revert "Revert "Revert "remove pandas temporarily for heroku"""

This reverts commit d61347c7796c22fd9854b84607df29af76ebdf1b.