[Json] Improve json effect informations

[SrMouraSilva]

• Remove min and max informations from a audio plugin
• Add plugin version data

Remove min and max informations from a audio plugin

The current implementation add minimum and maximum informations from a audio plugin!

Rationale: This information demands a greater effort for other developers to build compatible json pedalboards.

{
    "technology": "lv2",
    "plugin": "http://calf.sourceforge.net/plugins/Flanger",
    "active": true,
    "params":[{
        "value": 0.10000000149011612,
        "minimum":0.10000000149011612,
        "maximum":10,
        "index": 4,
        "symbol": "min_delay"
    },
    {
        "value": 1,
        "minimum": 0.10000000149011612,
        "maximum": 10,
        "index": 5,
        "symbol": "mod_depth"
    }

Add plugin version data