Initial Support for Simple Map decoding with unnamed toml keys

[orchestr7]

What's done:

• Phaze 1: only primitive tables (without nested multiple tables) with no explicit type checking.
• The idea is to decode unnamed arguments.
  For example:

[map]
a = 1
b = 2 

or

map = {a=1, b=2}

Should be decoded (without knowing and naming explicitly toml keys) to:

data class Test {
    val map: Map<String, Int>
}

Guys like @jakubgwozdz @y9san9 requested it and it looks like it can be useful for parsing gradle configs.

[github-advanced-security]

ktlint found more than 10 potential problems in the proposed changes. Check the Files changed tab for more details.

[orchestr7]

@y9san9 implemented as we have discussed with you 😄