meson: depend on pipewire 0.3.26

Not really a hard requirement, wrt libpipewire API, but it's
hard to keep runtime compatibility with earlier versions when
it comes to configuration options

meson.build

@@ -46,7 +46,7 @@ gmodule_dep = dependency('gmodule-2.0', version : glib_req_version)
 gio_dep = dependency('gio-2.0', version : glib_req_version)
 giounix_dep = dependency('gio-unix-2.0', version : glib_req_version)
 spa_dep = dependency('libspa-0.2', version: '>= 0.2')
-pipewire_dep = dependency('libpipewire-0.3', version: '>= 0.3.20')
+pipewire_dep = dependency('libpipewire-0.3', version: '>= 0.3.26')
 mathlib = cc.find_library('m')
 threads_dep = dependency('threads')