build: add category to Manifest

build.gradle

@@ -3,11 +3,11 @@ plugins {
     id 'distribution'
     id 'idea'
 	id 'eclipse'
-    id "org.omegat.gradle" version "1.4.2"
+    id "org.omegat.gradle" version "1.5.7"
 }
 
 omegat {
-    version = "5.4.1"
+    version = "5.8.0"
     pluginClass = pluginMainClass
 }
 

gradle.properties

@@ -1,7 +1,11 @@
 pluginMainClass=net.briac.omegat.plugin.omt.ManageOMTPackage
+
 plugin.name=OMT Package Plugin
 plugin.author=Briac Pilpr\u00e9
+plugin.category=importexport
 plugin.description=https://github.com/briacp/plugin-omt-package
 plugin.link=https://github.com/briacp/plugin-omt-package
-version=1.8.0
+plugin.license=GNU General Public License version 3
+
+version=1.8.1
 omegatPluginDir=C:/Users/briac/AppData/Roaming/OmegaT/plugins/