YAML merge issue with strings and arrays

[rhukster]

As found in Grav, when you are merging YAML configurations and the original YAML is an array, and an overridden YAML is a string, you get an exception:

There is currently no handling of this scenario of incompatible merge types.

[w00fz]

One year after... this was fixed I take? :)

[mahagr]

I cannot remember. :)

[rhukster]

I don't think its sorted. We sort of tabled this for later.