update dependencies (#663)

package.json

@@ -53,19 +53,19 @@
     "xtend": "^4.0.1"
   },
   "devDependencies": {
-    "@types/node": "^8.0.20",
-    "browserify": "^14.3.0",
+    "@types/node": "^10.3.1",
+    "browserify": "^16.2.2",
     "bundle-collapser": "^1.2.1",
-    "dependency-check": "^2.8.0",
+    "dependency-check": "^3.1.0",
     "discify": "^1.6.0",
     "hyperscript": "^2.0.2",
     "pretty-bytes-cli": "^2.0.0",
-    "spok": "^0.8.1",
-    "standard": "^10.0.0",
+    "spok": "^0.9.1",
+    "standard": "^11.0.1",
     "tape": "^4.6.3",
     "tinyify": "^2.2.0",
     "uglify-es": "^3.0.17",
-    "uglifyify": "^4.0.1",
+    "uglifyify": "^5.0.0",
     "unassertify": "^2.0.4"
   }
 }