ⓦ and ⓥ are mixed up and other mistakes

See here:

https://github.com/pid/speakingurl/blob/563da7ebd8c957804de43a92359d6e53796c3226/lib/speakingurl.js#L785-L786

https://github.com/pid/speakingurl/blob/563da7ebd8c957804de43a92359d6e53796c3226/lib/speakingurl.js#L711-L712

Expected: 

```js
"ⓥ": "v",
"ⓦ": "w",

"⑲": "19", 
"⑳": "20",
```