feat: Added .getData in init function

- The code change updates the method name from `.getValue` to `.getData` in the `init` function. This change ensures consistency by accurately reflecting the purpose of the method and does not rewrite setValue function which can be used to get the innerHTML or innerText.

Author: frankpagan

src/index.js

@@ -43,7 +43,7 @@ function init(element) {
         if (!source) {
             sources.set(element[i], { element: element[i] })
             element[i].renderValue = (data) => render({ source: element[i], data })
-            element[i].getValue = () => sources.get(element[i]).data
+            element[i].getData = () => sources.get(element[i]).data
         }
     }
 }