[gnome-shell/bilelmoussaoui/extensions/fix] ExtensionsPref: always convert the extension version to a string

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit c421f337d08ea3afad9624e1aafc00e52e4e51ea
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Mon Mar 2 10:02:56 2020 +0000

    ExtensionsPref: always convert the extension version to a string
    
    This fixes: Wrong type number; string expected

 js/extensionPrefs/main.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/extensionPrefs/main.js b/js/extensionPrefs/main.js
index 1ae010b361..8aaeea1512 100644
--- a/js/extensionPrefs/main.js
+++ b/js/extensionPrefs/main.js
@@ -691,7 +691,7 @@ var ExtensionRow = GObject.registerClass({
     }
 
     get version() {
-        return this._extension.metadata.version || '';
+        return this._extension.metadata.version.toString() || '';
     }
 
     _updateState() {
@@ -703,7 +703,7 @@ var ExtensionRow = GObject.registerClass({
 
         this._updatesIcon.visible = this.hasUpdate;
 
-        this._versionLabel.label = this.version.toString();
+        this._versionLabel.label = this.version;
         this._versionLabel.visible = this.version !== '';
 
         this._authorLabel.label = this.creator.toString();