Update to node 10

Author: kimmobrunfeldt

.travis.yml

@@ -1,5 +1,5 @@
 language: node_js
 node_js:
-  - "8"
+  - "10"
 env:
   - ALLOW_HTTP=true

package.json

@@ -4,7 +4,7 @@
   "description": "Web page PDF rendering done right. Packaged to an easy API.",
   "main": "src/index.js",
   "engines": {
-    "node": "8.x.x"
+    "node": "10.x.x"
   },
   "scripts": {
     "start": "nodemon --watch ./src -e js src/index.js",