Bump version number, use pear/net_sieve

plugins/managesieve/composer.json

@@ -3,7 +3,7 @@
     "type": "roundcube-plugin",
     "description": "Adds a possibility to manage Sieve scripts (incoming mail filters). It's clickable interface which operates on text scripts and communicates with server using managesieve protocol. Adds Filters tab in Settings.",
     "license": "GPLv3+",
-    "version": "8.7",
+    "version": "9.3",
     "authors": [
         {
             "name": "Aleksander Machniak",
@@ -15,15 +15,11 @@
         {
             "type": "composer",
             "url": "https://plugins.roundcube.net"
-        },
-        {
-            "type": "vcs",
-            "url": "https://github.com/roundcube/Net_Sieve.git"
         }
     ],
     "require": {
         "php": ">=5.3.0",
         "roundcube/plugin-installer": ">=0.1.3",
-        "roundcube/net_sieve": "~1.5.0"
+        "pear/net_sieve": "~1.4.4"
     }
 }