package/kodi-pvr-iptvsimple: bump version to 7.4.3-Matrix

package/kodi-pvr-iptvsimple: bump version to 7.4.3-Matrix

Switch dependency to kodi after upstream removed the dependency to
kodi-platform:
https://github.com/kodi-pvr/pvr.iptvsimple/commit/61fa5d222bc5633d7b1e1c231c089b61fbb0a8c5
https://github.com/kodi-pvr/pvr.iptvsimple/commit/2d9c01439301292992b6e32c578c222b9eddea69

Switch from rapidxml to pugixml:
https://github.com/kodi-pvr/pvr.iptvsimple/commit/b4e292f11c7c3f40b8c7ff18f28f7b2e149c6bee
https://github.com/kodi-pvr/pvr.iptvsimple/commit/6325b2a958888e88809d7d6036610198cb2d3b09

Add missing dependency to zlib.

Added runtime dependencies to inputstream addons:
https://github.com/kodi-pvr/pvr.iptvsimple/commit/af9a1b6933664ef24d407051f20985682881544d
https://github.com/kodi-pvr/pvr.iptvsimple/commit/46bd18fe84227e59b2d3378b17fafb87bcd87f33

Switch license file to LICENSE.md.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>