Add to the format was originally JSON format support

[obetame]

parse json data will get error message

First of all thank the author raynos for this tool.

var safeParse = require("safe-json-parse/callback");
var a = {
  name:"wowo"
}
safeParse(a,function(error,json){
  if(error){
    // get error operation
  }
})

But I tried to solve it myself.

safeParse(JSON.stringify(a),function(error,json){
  if(error){
    // get error operation
  }
})

So I improved it.

[Raynos]

I do not understand this change, can you add a failing test ?

[obetame]

failing test:

var a = {name:'wowo'}
safe(a,function(error,json){
  if(error){
    console.log(error);//get error message
    console.log(json);//get undefined message
  }
  else{
    console.log(json);
})

[Raynos]

That's expected, there should be no json if we have an error with parsing.

[obetame]

Sometimes I do not know my data format is JSON, so it will prompt the error.
I think we should not meet the security, but also should pursue the right.