Change YAML name format

[frederike-ramin]

I always struggle when writing our yaml, so I changed the syntax a little. For now only with achievements:

achievement:
         name: XYZ
         amount: 1

instead of

achievement: XYZ
        amount: 1

To be consistent, I'd also like to change that with xp requirements, but first wanted to hear your opinion on this.

[cmfcmf]

To be consistent, I'd also like to change that with xp requirements, but first wanted to hear your opinion on this.

Yes, please!! I'm 💯% for this change. As discussed, we could later™ introduce a config normaliser which normalises achievement: 'blah' to achievement: {name: 'blah'}.

[coveralls]

Pull Request Test Coverage Report for Build 24

• 6 of 6 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 96.254%

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Totals
Change from base Build 22:	0.0%
Covered Lines:	258
Relevant Lines:	262

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💛 - Coveralls