Add stacklevel=2 in deprecation warning

[char101]

Hi,

Could you add a stacklevel of as least 2 in

path/path/__init__.py

Line 682 in 6debbce

warnings.warn(".text is deprecated; use read_text", DeprecationWarning)

So that the user can know which code call the function. Without a stacklevel of as least 2, it will only show the deprecation warning originating from path/__init__.py.