Regex not recognize filenames with extra dot in it

File example:
```
<html>
<body>
<script src="some-name.anotherone.js"></script>
</body>
</html>
```
Command:
`python linkfinder.py -i s.html -o cli `
outputs nothing
Solution: 
Changing reqular expression by adding dot to filename regex. 
from:
`([a-zA-Z0-9_\-]{1,}                 # filename`
to:
`([a-zA-Z0-9_\-.]{1,}                 # filename`

