Bumped flake8 version to avoid problems with proto
Bumped flake8 version to avoid problems with proto

ohsu-computational-biology/server,macieksmuga/server,saupchurch/server,saupchurch/server,dcolligan/server,david4096/ga4gh-server,dcolligan/server,ga4gh/server,ga4gh/server,macieksmuga/server,ohsu-computational-biology/server,ga4gh/server,david4096/ga4gh-server,macieksmuga/server,dcolligan/server,ohsu-computational-biology/server,david4096/ga4gh-server,saupchurch/server