Fix non scaped . dot on str_to_cur
Fix non scaped . dot on str_to_cur

The fact that there's a non scaped . (dot) on the RegExp constructor, make the replace fail, and return an empty string

```js
'R$1200,00'.replace(new RegExp('.', 'g'), '') -> ""
'R$1200,00'.replace(new RegExp('\\.', 'g'), '') -> "R$1200,00"
```
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