plugins: Use Python 3.x for Python plugins

src/eom-plugin-engine.c

@@ -120,7 +120,7 @@ eom_plugin_engine_new (void)

	engine = EOM_PLUGIN_ENGINE (g_object_new (EOM_TYPE_PLUGIN_ENGINE, NULL));

	peas_engine_enable_loader (PEAS_ENGINE (engine), "python");
	peas_engine_enable_loader (PEAS_ENGINE (engine), "python3");

	user_plugin_path = g_build_filename (eom_util_dot_dir (),
	                                     USER_EOM_PLUGINS_LOCATION, NULL);