Log Message:
py-lxml: updated to 4.5.0

4.5.0:
Features added
* A new function ``indent()`` was added to insert tail whitespace for pretty-printing
  an XML tree.

Bugs fixed
* Tail text of nodes that get removed from a document using item
  deletion disappeared silently instead of sticking with the node that was removed.

Other changes
* MacOS builds are 64-bit-only by default.
  Set CFLAGS and LDFLAGS explicitly to override it.
* Linux/MacOS Binary wheels now use libxml2 2.9.10 and libxslt 1.1.34.
* The package version number is now available as ``lxml.__version__``.