Panics with list of objects

[DBL-Lee]

I was able to reproduce with following minimal code:

package main

import (
	"encoding/json"

	"github.com/herkyl/patchwerk"
)

type Foo struct {
	Name string
}

func main() {
	from, _ := json.Marshal([]Foo{
		Foo{
			Name: "a",
		},
		Foo{
			Name: "b",
		},
	})
	to, _ := json.Marshal([]Foo{
		Foo{
			Name: "c",
		},
	})
	_, err := patchwerk.Diff(
		[]byte(from),
		[]byte(to),
	)
	if err != nil {
		panic(err)
	}
}

It panics with: panic: runtime error: index out of range [1] with length 1