fix: observer taget has been renamed to selector

Author: frankpagan

src/client.js

@@ -953,7 +953,7 @@ async function Delete(file) {
 Observer.init({
     name: 'CoCreateFileAddedNodes',
     observe: ['addedNodes'],
-    target: '[type="file"]',
+    selector: '[type="file"]',
     callback: mutation => init(mutation.target)
 
 });
@@ -962,7 +962,7 @@ Observer.init({
     name: 'CoCreateFileAttributes',
     observe: ['attributes'],
     attributeName: ['type'],
-    target: '[type="file"]',
+    selector: '[type="file"]',
     callback: mutation => init(mutation.target)
 });