Double quotes are escaped incorrectly with backslash in front of them

[Cheprer]

There was problem with parsing a value with a property like this retrieved from calling get on redis-cli normally it would be without " on start and end of the value and key:

\"error\":\"500 - \\\"Failed authorization procedure. domain.com (http-01): urn:acme:error:unknownHost :: The server could not resolve a domain name :: No valid IP addresses found for domain.com\\\\\\\\n\\\\\\\\n\\\"\"

After parsing the message was like this:

"error":"500 - \\"Failed authorization procedure. domain.com (http-01): urn:acme:error:unknownHost :: The server could not resolve a domain name :: No valid IP addresses found for domain.com\\\\n\\\\n\\""

Which is wrong because \" it should be either " or \".

I've made a pull request with changes only thing needed is to code review it and merge it(maybe some versioning). Please let me know once it's on npm.

#16