Check the conflict characters only
Check the conflict characters only

```javascript
// <-- : conflict ranges
// --> : change to

(0x00E8 <= c && c <= 0x00ED)　<-- (0x00E8 <= c && c <= 0x00EA) || (0x00EC <= c && c <= 0x00ED)
(0x00F2 <= c && c <= 0x00F5)　<-- (0x00F2 <= c && c <= 0x00F3)   
(0x00F9 <= c && c <= 0x00FA)　<-- (0x00F7 <= c && c <= 0x00FA) --> (0x00F7 <= c && c <= 0x00F8)
(0x0110 <= c && c <= 0x0111)　<-- (0x0111 == c)
```
tokuhirom/visualwidth-js,martinheidegger/visualwidth-js,martinheidegger/visualwidth-js,tokuhirom/visualwidth-js