Hyphens are stripped from barcode

[Wunja]

When scanning a bar code that includes hyphens, these characters are stripped out of the value pasted into the receiving field.
Bar codes based on Code 39 allow the following special characters: -, ., $, /, +, %, and space

[Glideh]

Characters are filtered here

jquery-code-scanner/jquery-code-scanner.js

Lines 12 to 14 in 7a727c2

	if ((keycode >= 65 && keycode <= 90) ||
	(keycode >= 97 && keycode <= 122) ||
	(keycode >= 48 && keycode <= 57)

Feel free to PR additional chars or suggest a different way to filter those, maybe with a setting.