Github Key Field for Issue_Milestones, Events, Projects_Tables are Floats (Won't work with BigQuery)

[natestax]

Big query cannot handle floats as key fields. Tap-github converts id's to floats due to length of the number of digits on to the key fields in the new project management tables (events, issue_milestones...). "6066309.0" for example. This needs to be converted to a string in cases like these before it could be ingested by big query.