support StaticBlock

[linsk1998]

class Foo{
	static {
      
    }
}

{
	"type": "StaticBlock",
	"start": 12,
	"end": 33,
	"loc": {
		"start": {
			"line": 2,
			"column": 1,
			"index": 12
		},
		"end": {
			"line": 4,
			"column": 5,
			"index": 33
		}
	},
	"body": []
}

fnParent.node.body.body get undefined