Negative number in a list is not handled

[tapankavasthi]

Steps to reproduce

Sample Yaml:

- 123
- 456
- -23

Sample code:

val parsedData: List<Any?> = Yaml.Default.decodeListFromString(yamlStr)

Discrepancy:

Expected [123, 456, -23]
Actual [123, 456, [23]]

For the last entry, the parser treats it as a start of another list, instead of considering it as a negative number.

As per the specs, there must be a space after the dash for a list component.

[uriel-4]

This also happens with a number in an object:

minY: -512
maxY: 512

here minY is parsed also as a list with one number.
I suppose all negative numbers are bugged in this library.

[jmeberlein]

A similar issue happens with numbers in strings. minY: "512" will be parsed as a numeric, not a string