Fixed error with Rails 6.1rc1 and jsonb - fixes #304
Fixed error with Rails 6.1rc1 and jsonb - fixes #304

Co-authored-by: Julian Nadeau <8abcc0ecfb7f66cf0991ef690142bc60ed72c8e0@users.noreply.github.com>

ankane/blazer,ankane/blazer,ankane/blazer