Update dependencies

package.json

@@ -26,7 +26,7 @@
     "clone": "2.1.0",
     "color": "1.0.3",
     "cors": "2.8.1",
-    "express": "4.14.0",
+    "express": "4.14.1",
     "glyph-pbf-composite": "0.0.2",
     "handlebars": "4.0.6",
     "mbtiles": "0.9.0",
@@ -45,8 +45,8 @@
     "tileshrink-gl": "./plugins/tileshrink-gl"
   },
   "devDependencies": {
-    "should": "^11.1.1",
+    "should": "^11.2.0",
     "mocha": "^3.2.0",
-    "supertest": "^2.0.1"
+    "supertest": "^3.0.0"
   }
 }