replace 'problems' key with 'exercises' in config.json

[cgrayson]

see #345

[petertseng]

Can I get a confirm that it is safe to delete the problems key?

Yes, it appears I can get it. exercism/DEPRECATED.x-api#137 has made it happen. Good. One last check before merge (that the order is the same.

[petertseng]

Good, empty output from diff -u <(jq '.["problems"]' < config.json) <(jq '.["exercises"] | map(.["slug"])' < newconfig.json)

One last question: Should we put the slug key before the difficulty key?

[cgrayson]

I listed the attributes alphabetically, as I'm used to doing in JSON, but if you prefer slug first, happy to change it.

[petertseng]

I really wished I could point to an example of how it should be done, but my hope was dashed! Because #345 has it BOTH ways ("hello-world" is slug first, and then "anagram" and "forth" are alphabetical!)

My instinct was slug first since it is "the most important", but now I have no ground to stand on! @kytrinyx does this matter to you? If not I'll just take it.

[petertseng]

We could just take it now and defer the decision. If we want to change it, we can change it when we make the difficulty values non-1, since all the lines will change anyway. Except the ones that stay 1.

[kytrinyx]

does this matter to you

I can't decide one way or the other. My instinct says slug first, since it's the identifier for the exercise.

Let's take this and change it later if we decide we care enough!

[petertseng]

Thanks everyone.