refactor: transform var to let/const (#120)

diff --git a/bin/templates/cordova/Api.js b/bin/templates/cordova/Api.js
index e2b5eb2..6c83e97 100644
--- a/bin/templates/cordova/Api.js
+++ b/bin/templates/cordova/Api.js
@@ -174,7 +174,7 @@
                     .remove_plugin_changes(plugin, /* is_top_level= */true)
                     .save_all();
 
-                var targetDir = uninstallOptions.usePlatformWww
+                const targetDir = uninstallOptions.usePlatformWww
                     ? this.getPlatformInfo().locations.platformWww
                     : this.getPlatformInfo().locations.www;