Describe the bug

Attempting to rename text with no LSP attached will fail silently after displaying prompt for new name.

To reproduce

Steps to reproduce the behavior:

1. Open file with no LSP attached.
2. Run lua require('renamer').rename() on any word.
3. Notice that nothing happens just like operation would be successful.

Expected behavior

A discreet message should be displayed and no input box should be opened if there is nothing to rename.

Environment

• Renamer: v3.0.2
• Neovim: v0.5.1
• OS: Windows, version: 10

Screenshots

Additional context

When LSP is attached the prompt will be shown also for invalid elements, but at least there is a warning displayed afterward.