fix(deps): use meta-marked from NPM

Signed-off-by: David Mehren <git@herrmehren.de>

lib/models/note.js

@@ -5,7 +5,7 @@ const path = require('path')
 const LZString = require('lz-string')
 const base64url = require('base64url')
 const md = require('markdown-it')()
-const metaMarked = require('meta-marked')
+const metaMarked = require('@hedgedoc/meta-marked')
 const cheerio = require('cheerio')
 const shortId = require('shortid')
 const Sequelize = require('sequelize')