bump version

manifest.json

@@ -6,7 +6,7 @@
         "48": "extension/ui/resources/icon_48.png",
         "128": "extension/ui/resources/icon_128.png"
     },
-    "version": "1.1.19",
+    "version": "1.1.20",
     "description": "Archive a complete page into a single HTML file",
     "background": {
         "scripts": [