StartBufSize is the default starting size of the buffer used to scan and parse multi-statement migrations
var StartBufSize = 4096
func Parse(reader io.Reader, delimiter []byte, maxMigrationSize int, h Handler) error
Parse parses the given multi-statement migration
Handler handles a single migration parsed from a multi-statement migration. It's given the single migration to handle and returns whether or not further statements from the multi-statement migration should be parsed and handled.
type Handler func(migration []byte) bool