Bug in options from strings

I don't know if this documented, but "width" can be not only int but float (this is required to draw fitted svg barcodes). But since it works using options it should work using jsbarcode-width attribute, but it don't.
This is due to bug in src/help/optionsFromStrings.js
parseInt should be replaced with parseFloat for "jsbarcode-width" option.

Start in src/help/optionsFromStrings.js and trace how the jsbarcode-width attribute is converted from a string. Verify that fractional width values are preserved for attribute-based options while integer values continue to work.

Written by the indexing model from the issue text.