Support of `InlineStrings` and others

[pfarndt]

The package does not allow to use a more general string type (such as InlineSring, which are often used by CSV.jl )

using InlineStrings
using PythonCall


re = pyimport("re")

# s is a String and all is fine:
s = "abc123def456ghi789"
re.findall("[a-z]", s)


# s is an InlineString 
s = InlineString("abc123def456ghi789")
re.findall("[a-z]", s)

The last line errors with:

ERROR: Python: TypeError: expected string or bytes-like object

A simple

Py(s::AbstractString) = Py(String(s))

should do the trick.