Consider changing field naming convention

[evankanderson]

The in-toto project discovered that hyphen-separated names are difficult to handle for a number of infix languages, including Python and JavaScript (maybe also Ruby, I'm not as familiar there). Similarly, poking at these documents with yq will be more difficult (access as .["assessment-log"][*] rather than .assessmentLog[*]).

There may be other good reasons for this style, but I wanted to highlight the tradeoff before 1.0.

Originally posted by @evankanderson in #117 (comment)

[eddie-knight]

This revisits the decision logged in #39

[evankanderson]

I'm also going to vote for the suggestion in #39 (comment), which is to attempt to use one-word names where possible, which avoids this issue. 😁