ResourceWarning in attachment.upload. File not closed.

[olivergondza]

When an attachment is uploaded, following warning is issued.

./usr/local/lib/python3.9/site-packages/pysnow/attachment.py:70: ResourceWarning: unclosed file <_io.BufferedReader name='/my/file.txt'>
  data = open(file_path, "rb").read()

pysnow/pysnow/attachment.py

Line 70 in 6ac140a

data = open(file_path, "rb").read()