script to bump version
script to bump version

Summary: `scripts/bump_version.sh 0.124.0` updates all the version number constants

Reviewed By: panagosg7

Differential Revision: D21185653

fbshipit-source-id: 4d3958d6d5d220e646667a1e97777f0e448b3f07

facebook/flow,mroch/flow,facebook/flow,mroch/flow,facebook/flow,mroch/flow,facebook/flow,facebook/flow,mroch/flow,facebook/flow,facebook/flow,mroch/flow,mroch/flow,mroch/flow