update 'vulnerable' dev dependencies

package-lock.json

@@ -1527,9 +1527,9 @@
       "optional": true
     },
     "jshint": {
-      "version": "2.13.0",
-      "resolved": "https://registry.npmjs.org/jshint/-/jshint-2.13.0.tgz",
-      "integrity": "sha512-Nd+md9wIeyfDK+RGrbOBzwLONSTdihGMtyGYU/t7zYcN2EgUa4iuY3VK2oxtPYrW5ycTj18iC+UbhNTxe4C66g==",
+      "version": "2.13.4",
+      "resolved": "https://registry.npmjs.org/jshint/-/jshint-2.13.4.tgz",
+      "integrity": "sha512-HO3bosL84b2qWqI0q+kpT/OpRJwo0R4ivgmxaO848+bo10rc50SkPnrtwSFXttW0ym4np8jbJvLwk5NziB7jIw==",
       "dev": true,
       "requires": {
         "cli": "~1.0.0",
@@ -1538,7 +1538,6 @@
         "htmlparser2": "3.8.x",
         "lodash": "~4.17.21",
         "minimatch": "~3.0.2",
-        "shelljs": "0.3.x",
         "strip-json-comments": "1.0.x"
       }
     },
@@ -2350,12 +2349,6 @@
       "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.0.tgz",
       "integrity": "sha512-BvE/TwpZX4FXExxOxZyRGQQv651MSwmWKZGqvmPcRIjDqWub67kTKuIMx43cZZrS/cBBzwBcNDWoFxt2XEFIpQ=="
     },
-    "shelljs": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/shelljs/-/shelljs-0.3.0.tgz",
-      "integrity": "sha1-NZbmMHp4FUT1kfN9phg2DzHbV7E=",
-      "dev": true
-    },
     "slash": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/slash/-/slash-2.0.0.tgz",

package.json

@@ -29,7 +29,7 @@
     "ws": "^3.3.1"
   },
   "devDependencies": {
-    "jshint": "^2.10.2",
+    "jshint": "^2.13.4",
     "less": "3.7.1",
     "lesshint": "6.3.7",
     "selenium-webdriver": "^3.6.0"