feat: FakeData support recursive type by using opt

[wolf-joe]

original FakeData() will cause stack overflow when it handling recursive type:

type BinaryTreeNode struct {
	Val   int
	Left  *BinaryTreeNode
	Right *BinaryTreeNode
}

func TestFakeData_RecursiveType(t *testing.T) {
	toJSON := func(val interface{}) string {
		data, _ := json.MarshalIndent(val, "", "  ")
		return string(data)
	}
	node1 := BinaryTreeNode{}
	if err := FakeData(&node1); err != nil {
		t.Errorf("%+v", err)
		t.FailNow()
	}
	t.Log("binary tree node:", toJSON(node1))
}

runtime: goroutine stack exceeds 1000000000-byte limit
...
fatal error: stack overflow

advance usage:

func TestFakeData_RecursiveType(t *testing.T) {
	toJSON := func(val interface{}) string {
		data, _ := json.MarshalIndent(val, "", "  ")
		return string(data)
	}
	node1 := BinaryTreeNode{}
	if err := FakeData(&node1, WithRecursionMaxDepth(2)); err != nil {
		t.Errorf("%+v", err)
		t.FailNow()
	}
	t.Log("binary tree node:", toJSON(node1))
}

[bxcodec]

Hi @wolf-joe

I merged #160, can you help to fix the conflict?

[wolf-joe]

Hi @wolf-joe

I merged #160, can you help to fix the conflict?

done

[bxcodec]

LGTM

[bxcodec]

Hi @wolf-joe, thanks for your PR. I'm planning to release a new major version with this option.
the PR can be seen here #169
if you have time, can you help to review? I really appreciate your help