make dist dir postinstall, fix CI

package-lock.json

@@ -7,6 +7,7 @@
     "": {
       "name": "pronoun-monster",
       "version": "0.1.0",
+      "hasInstallScript": true,
       "license": "Unlicense",
       "devDependencies": {
         "ava": "^5.2.0",

package.json

@@ -4,6 +4,7 @@
   "description": "Rawr, if you must refer to me this is how you may",
   "main": "app.js",
   "scripts": {
+    "postinstall": "mkdir ./dist",
     "start": "concurrently npm:serve:*",
     "build": "concurrently npm:build:*",
     "serve:handlebars": "node app.js",