Change protocol_core.method to an array

[mshadbolt]

For which schema is a change/update being suggested?

I would like to update the protocol_core schema

What should the change/update be?

I would like to modify the ontologised method field to an array so that more than one method can be specified.

I am not sure if this minor/major

Why is the change requested?

The particular use case for this is when researchers use the 'GentleMACS' dissociator it incorporates both mechanical and enzymatic dissociation.