[M. Update] x11/py-qtpy 1.5.1 -> 1.5.2

[Elias M. Mariani]

Changelog:
https://github.com/spyder-ide/qtpy/blob/master/CHANGELOG.md#version-152-2018-10-20
Mainly bugfixes and additions. Those changes shouldn't affect consumers.
Regression test passing.
Tested with devel/spyder/spyder OK.

Cheers.
Elias.

py-qtpy-1.15.2.diff
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