Backport PyBind11 3.x compatibility patch

Fix rhbz#2383231

xtensor-python.spec

@@ -1,7 +1,7 @@
 %undefine __cmake_in_source_build
 
 Name:           xtensor-python
-Version:        0.26.0
+Version:        0.28.0
 Release:        %autorelease
 Summary:        Python bindings for xtensor
 # Automatically converted from old format: BSD - review is highly recommended.
@@ -10,6 +10,10 @@ URL:            https://xtensor-python.readthedocs.io/
 
 %global github  https://github.com/QuantStack/xtensor-python
 Source0:        %{github}/archive/%{version}/%{name}-%{version}.tar.gz
+Patch0:         %{github}/pull/324.diff
+Patch1:         %{github}/pull/326.diff
+Patch2:         %{github}/pull/325.diff
+Patch3:         %{github}/pull/327.diff
 
 # because xtensor does so for armv7hl, ppc64le and s390x
 ExcludeArch:    armv7hl ppc64le s390x
@@ -68,6 +72,7 @@ Requires:       python3-numpy
 %license LICENSE
 %{_includedir}/%{name}/
 %{_libdir}/cmake/%{name}/
+%{_datadir}/pkgconfig/%{name}.pc
 
 %changelog
 %autochangelog