* fix: do not alter an event's data attribute
When setting an event's data attribute we were trying to be really clever
and this is problematic. Instead, keep the data attribute unchanged. Per
the 1.0 specification, the data attribute is still inspected to determine
if it is binary, and if so, a data_base64 attribute is added with the
contents of the data property encoded as base64.
Fixes: https://github.com/cloudevents/sdk-javascript/issues/343
Signed-off-by: Lance Ball <lball@redhat.com>
Lance Ball