Upgraded dependencies, added package-lock.json (npm v5)

HISTORY.md

@@ -6,6 +6,7 @@ https://github.com/josdejong/jsoneditor
 ## 2017-05-26, version 5.7.0
 
 - Implemented support for template items. Thanks @israelito3000.
+- Upgraded dependencies to the latest versions. Thanks @andreykaipov.
 
 
 ## 2017-04-15, version 5.6.0

package.json

@@ -23,20 +23,20 @@
     "test": "mocha test"
   },
   "dependencies": {
-    "ajv": "5.1.0",
+    "ajv": "5.2.0",
     "brace": "0.10.0",
     "javascript-natural-sort": "0.7.1"
   },
   "devDependencies": {
     "gulp": "3.9.1",
-    "gulp-clean-css": "3.0.4",
+    "gulp-clean-css": "3.4.2",
     "gulp-concat-css": "2.3.0",
     "gulp-shell": "0.6.3",
     "gulp-util": "3.0.8",
     "json-loader": "0.5.4",
     "mkdirp": "0.5.1",
-    "mocha": "3.2.0",
-    "uglify-js": "2.8.22",
-    "webpack": "1.12.14"
+    "mocha": "3.4.2",
+    "uglify-js": "3.0.18",
+    "webpack": "1.13.1"
   }
 }