Update .horde.yml with extended information.

.horde.yml

@@ -5,3 +5,37 @@ full: Text diff generation and rendering library
 description: A text-based diff engine and renderers for multiple diff output formats.
 list: dev
 type: library
+homepage: https://www.horde.org/libraries/Horde_Text_Diff
+authors:
+  -
+    name: Chuck Hagenbuch
+    user: chuck
+    email: chuck@horde.org
+    active: true
+    role: lead
+  -
+    name: Jan Schneider
+    user: jan
+    email: jan@horde.org
+    active: true
+    role: lead
+version:
+  release: 2.2.1
+  api: 1.2.0
+state:
+  release: stable
+  api: stable
+license:
+  identifier: LGPL-2.1
+  uri: http://www.horde.org/licenses/lgpl21
+dependencies:
+  required:
+    php: ^5.3 || ^7
+    pear:
+      pear.horde.org/Horde_Exception: ^2
+      pear.horde.org/Horde_Util: ^2
+  optional:
+    pear:
+      pear.horde.org/Horde_Cli: ^2.1
+      pear.horde.org/Horde_Test: ^2.1
+      pecl.php.net/xdiff: '*'