Describe the bug
Hashtag entities not working in Chinese (zh).

To Reproduce

const { NlpManager } = require('node-nlp');
const manager = new NlpManager({ languages: ['zh'] });
let res = await manager.process('zh', '#帥 #handsome')
console.log('Hashtag: ' + JSON.stringify(res.entities));    

Expected behavior
The Chinese hashtag '#帥' should be found.

v3.1.1 version result:
Hashtag: [{"start":3,"end":11,"len":9,"accuracy":0.95,"sourceText":"#handsome","utteranceText":"#handsome","entity":"hashtag","resolution":{"value":"#handsome"}}]

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Version: v3.1.1 Node v8.15.1