Not support pathlib

[secsilm]

I found that pydub doesn't support pathlib. Hope support it. 😄

Steps to reproduce

from pydub import AudioSegment
from pathlib import Path

song_path = Path('never_gonna_give_you_up.mp3')
song = AudioSegment.from_mp3(song_path )

Actual behavior

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-16-199f26cc20dd> in <module>()
----> 1 song = AudioSegment.from_mp3(song_path)

c:\users\secsi\.virtualenvs\anayzing-jay-chou-songs-eu7t5y6x\lib\site-packages\pydub\audio_segment.py in from_mp3(cls, file, parameters)
    530     @classmethod
    531     def from_mp3(cls, file, parameters=None):
--> 532         return cls.from_file(file, 'mp3', parameters)
    533 
    534     @classmethod

c:\users\secsi\.virtualenvs\anayzing-jay-chou-songs-eu7t5y6x\lib\site-packages\pydub\audio_segment.py in from_file(cls, file, format, codec, parameters, **kwargs)
    469         input_file = NamedTemporaryFile(mode='wb', delete=False)
    470         try:
--> 471             input_file.write(file.read())
    472         except(OSError):
    473             input_file.flush()

AttributeError: 'WindowsPath' object has no attribute 'read'

Your System configuration

• Python version: Python 3.6.4 :: Anaconda, Inc.
• Pydub version: 0.21.0
• ffmpeg or avlib?: ffmpeg
• ffmpeg/avlib version: N-87043-gf0f4888

[jaden-young]

Hey! I actually fixed this in #252, which made its way into the 0.22.0 release. Bumping the pydub version in your requirements.txt or Pipfile from 0.21.0 to 0.22.0 or higher should fix the issue.