Output "." raises extension error in Predict

[SietsmaRJ]

Describe the bug

When CAPICE predict is run in Predict mode, supplying -o . on it's command line arguments, will raise an extension error that the file should end with either .tsv or .tsv.gz

System information (command line)

• OS: Manjaro
• Version: 3.1.0
• Python version: Python3.10.4
• Shell: ZSH

How to Reproduce

Steps to reproduce the behavior:

1. capice predict -i ./resources/predict_input.tsv.gz -m <path/to/model.pickle.dat> -o .

Expected behavior

If -o . is supplied, either raise error that -o . is default and doesn't need to be supplied OR rewrite code that -o . will also be the directory from where the CAPICE call is made.