python3-testpath: Rebuild for python 3.8

mingw-w64-python3-testpath/PKGBUILD

@@ -4,7 +4,7 @@ _realname=testpath
 pkgbase=mingw-w64-python-${_realname}
 pkgname=("${MINGW_PACKAGE_PREFIX}-python3-${_realname}")
 pkgver=0.4.2
-pkgrel=1
+pkgrel=2
 pkgdesc="Test utilities for code working with files and commands (mingw-w64)"
 url="https://pypi.python.org/pypi/testpath"
 arch=('any')