Use strict mode in the JavaScript binding.

Author: cscott

lib/index.js

@@ -1,3 +1,4 @@
+'use strict';
 var binary = require('node-pre-gyp');
 var path = require('path');
 var bindingPath =
@@ -13,8 +14,8 @@ var request = Promise.promisify(bindings.request);
 
 // Hacky way to make strings safe for eval.
 var addslashes = function(s) {
-  return "'" + s.replace(/[\'\\\000]/g, function(c) {
-    if (c === '\000') {
+  return "'" + s.replace(/[\'\\\x00]/g, function(c) {
+    if (c === '\x00') {
       return '\'."\0".\'';
     }
     return '\\' + c;