upgrade puppeteer to latest

Author: thescientist13

package.json

@@ -18,7 +18,7 @@
     "clean:deps": "rimraf **/node_modules/**",
     "lint": "ls-lint && eslint \"*.js\" \"./packages/**/**/*.js\" \"./test/*.js\" \"./www/**/**/*.js\"",
     "build": "node . build",
-    "serve": "yarn build && cd ./public && ws",
+    "serve": "yarn build && cd ./public && npx http-server .",
     "develop": "node . develop",
     "test": "export BROWSERSLIST_IGNORE_OLD_DATA=true && nyc mocha",
     "test:tdd": "yarn test --watch"

packages/cli/package.json

@@ -35,7 +35,7 @@
     "htmlparser2": "^4.1.0",
     "koa": "^2.13.0",
     "livereload": "^0.9.1",
-    "puppeteer": "^1.20.0",
+    "puppeteer": "^5.3.0",
     "rehype-raw": "^4.0.2",
     "rehype-stringify": "^8.0.0",
     "remark-frontmatter": "^2.0.0",