chore: stopping spinner with no text skips persist

If no text is provided to `cli.stopSpinner` then it should allow for
non-persistent usage of the spinner.

Author: ruyadorno

lib/cli.js

@@ -107,6 +107,11 @@ export default class CLI {
   }
 
   stopSpinner(rawText, status = SUCCESS) {
+    if (!rawText) {
+      this.spinner.stop();
+      return;
+    }
+
     let symbol;
     switch (status) {
       case SUCCESS: