Ciphey went into an error with a simple string

[DellZHackintosh]

• Have you read our Wiki page "Common Issues & Their Solutions"?

Describe the bug
A clear and concise description of what the bug is.

Plaintext
⚠️IMPORTANT⚠️ The below code is non-negotiable for "Ciphey didn't decrypt...." problems. If you do not tell us your plaintext, we will not help you.

Include your plaintext here, replacing this 

Version
⚠️IMPORTANT⚠️ We need this information because different environments will induce different bugs in Ciphey

• OS/Distro: Windows
• Python version: 3.8
• Ciphey versions:

Name: ciphey
Version: 5.14.0
Summary: Automated Decryption Tool
Home-page:
Author: Brandon
Author-email: brandon@skerritt.blog
License: MIT
Location: c:\py38\lib\site-packages
Requires: appdirs, base58, base91, cipheycore, cipheydists, click, flake8, loguru, mock, pybase62, pylint, pywhat, pyyaml, rich
Required-by:
---
Name: cipheycore
Version: 0.3.2
Summary:
Home-page:
Author: Cyclic3
Author-email: cyclic3.git@gmail.com
License:
Location: c:\py38\lib\site-packages
Requires:
Required-by: ciphey
---
Name: cipheydists
Version: 0.3.35
Summary: A collection of distributions, character sets and dictionaries for use in ciphey
Home-page:
Author: Cyclic3
Author-email: cyclic3.git@gmail.com
License:
Location: c:\py38\lib\site-packages
Requires:
Required-by: ciphey

• Did you use Docker? No

To Reproduce
Run this command.

ciphey -t "Eindows"

Possible plaintext: '."IPr' (y/N): **n**
Traceback (most recent call last):
  File "c:\py38\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\py38\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\py38\Scripts\ciphey.exe\__main__.py", line 7, in <module>
  File "c:\py38\lib\site-packages\click\core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "c:\py38\lib\site-packages\click\core.py", line 782, in main
    rv = self.invoke(ctx)
  File "c:\py38\lib\site-packages\click\core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "c:\py38\lib\site-packages\click\core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "c:\py38\lib\site-packages\ciphey\ciphey.py", line 263, in main
    result = decrypt(config, kwargs["text"])
  File "c:\py38\lib\site-packages\ciphey\ciphey.py", line 32, in decrypt
    res: Optional[iface.SearchResult] = config.objs["searcher"].search(ctext)
  File "c:\py38\lib\site-packages\ciphey\basemods\Searchers\ausearch.py", line 281, in search
    self.recursive_expand(node)
  File "c:\py38\lib\site-packages\ciphey\basemods\Searchers\ausearch.py", line 221, in recursive_expand
    self.expand_decodings(node)
  File "c:\py38\lib\site-packages\ciphey\basemods\Searchers\ausearch.py", line 213, in expand_decodings
    self.recursive_expand(new_node, False)
  File "c:\py38\lib\site-packages\ciphey\basemods\Searchers\ausearch.py", line 221, in recursive_expand
    self.expand_decodings(node)
  File "c:\py38\lib\site-packages\ciphey\basemods\Searchers\ausearch.py", line 213, in expand_decodings
    self.recursive_expand(new_node, False)
  File "c:\py38\lib\site-packages\ciphey\basemods\Searchers\ausearch.py", line 221, in recursive_expand
    self.expand_decodings(node)
  File "c:\py38\lib\site-packages\ciphey\basemods\Searchers\ausearch.py", line 202, in expand_decodings
    res = inst(val)
  File "c:\py38\lib\site-packages\ciphey\iface\_modules.py", line 186, in __call__
    return self.decode(*args)
  File "c:\py38\lib\site-packages\ciphey\basemods\Decoders\atbash.py", line 29, in decode
    return fix_case(result, ctext)
  File "c:\py38\lib\site-packages\ciphey\common.py", line 15, in fix_case
    [
  File "c:\py38\lib\site-packages\ciphey\common.py", line 16, in <listcomp>
    target[i].upper() if base[i].isupper() else target[i]
IndexError: string index out of range