58 edit interview responses

[mgwalker]

Allow users to edit interview responses. Based on this user story:

Scenario: Edit a interview answer

Given a completed interview And a category that has an answer or not When the standupper writes standup [channel] edit [category] Then standup-bot asks the interview question again And provides the previous answer And the standupper can provide a new answer And the new answer is recorded.

Also adds a response from the bot when it is updating an existing report, so the user gets some kind of feedback.

Closes #58.

[codecov-io]

Current coverage is 82.81%

Merging #74 into develop will decrease coverage by 0.16%

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- Misses           92         98     +6   
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[stvnrlly]

How would you feel about using an array of callbacks instead of conditionals? That seems to be what botkit recommends: https://github.com/howdyai/botkit#using-conversationask-with-an-array-of-callbacks. Also note the bot.utterances thing in there, which could be good to grab, as well.

[mgwalker]

Uses utterances and an array of callbacks now. Unfortunately there's still some conditional logic in there to determine what to say first and a promise to control whether the main body of the conversation happens or not.

[stvnrlly]

LGTM!