Backslash is incorrectly escaped in strings

[brantburnett]

Currently, only quote characters are escaped. However, N1QL strings support JSON-like backslash escaping as well. This means that any string with a single backslash will be misinterpreted and cause N1QL invalid syntax errors.

[
  {
    "code": 3000,
    "msg": "syntax error: invalid quoted string - at 'North American Ale\\'",
    "query": "SELECT * FROM `beer-sample` WHERE type = 'beer' AND category = 'North American Ale\\' LIMIT 1"
  }
]

https://forums.couchbase.com/t/how-to-sanitize-user-input/28830/4

Note: This is a potential security flaw, it may allow N1QL injection attacks.

[brantburnett]

Fixed by #352. The current plan is to only fix this for the new release which will be SDK 3.x compatible.