Reword ‘member’ to ‘field’

[rinarakaki]

I found it somewhat difficult to understand the meaning as I read it, as the word 'member' suggests people from a group, rather than an element of a whole data structure. I rarely see this use of the word 'member' these days, instead 'field' is used in most cases. It may depend on your background, but I want to note it here anyway. Thank you.

[marcoscaceres]

We follow JSON's terminology:

An object structure is represented as a pair of curly brackets surrounding zero or more name/value pairs (or members).