translation of yaml to json is buggy

[nightshift2k]

I noticed when specifying stoploss in the yaml when you do the following for one instance:

minimal_roi: '0': 0.015

it gets translated into json to this:

"minimal_roi": [ 0.015 ], which should be "minimal_roi": { "0": 0.015 },

So in general, probably this is not recognized as a numeric but rather a boolean value