using a Pathname as file argument results in error.

[rempargo]

When using a Pathname instead of a String for the file argument, I get an error.
See the following code:

require 'exiftool'
require 'pathname'
path=Pathname.new('p./public/images/test.jpg')
Exiftool.new(path)

will result in
NoMethodError: undefined method empty?' for #<Pathname:p./public/images/test.jpg>

the workaround is to convert the Pathname to a String:
Exiftool.new(path.to_s)

Ruby version 2.3.1

[mceachen]

pull requests are welcome (and this, specifically, seems fine)

[mceachen]

I just released v1.1.0 which addresses this.