Accept Tempfile in Stupidedi::Reader.build

[sshaw]

A Tempfile is a IO, really. From the docs:

A Tempfile objects behaves just like a File object, and you can perform all the usual file operations on it: reading data, writing data, changing its permissions, etc. So although this class does not explicitly document all instance methods supported by File, you can in fact call any File instance method on a Tempfile object.

Now when passing it to Stupidedi::Reader.build it results in a TypeError.

[kputnam]

Thanks for the bug report, and sorry for the long silence. I would accept a PR that addresses this!