Don't same variable name as variable function

When using this library in Safari (OsX or iPad) we may encounter the error:

'duplicate parameter in function with default parameter values'

This is related to the use of a variable name that is the same as the function and similar fix were applied in other libraries like:
https://github.com/jupyterlab/jupyterlab/pull/7993/files

src/elements/A.js

@@ -10,8 +10,8 @@ export default class A extends Container {
   }
 
   // Link target attribute
-  target (target) {
-    return this.attr('target', target)
+  target (targetValue) {
+    return this.attr('target', targetValue)
   }
 
   // Link url