Review: npm start demo `_verifyThread` never fires & `_useWASM` not working
**Describe the bug**
If you open the miner.html, ready will never fire. The test job will never run.

**To Reproduce**
Steps to reproduce the behavior:
line 187 of deepMiner.js 'this._verifyThread.verify' will never fire callback because 'ready' message is never posted 

**Expected behavior**
post message ready

**Desktop (please complete the following information):**
Ubuntu 18.04