Git_blacklist add exclude ignore_patterns

[Mte90]

Q	A
Version	vendor/bin/grumphp -V
Bug?	no
New feature?	yes
Question?	no
Documentation?	no
Related tickets	comma-separated list of related tickets

The git_blacklist task doesn't have ignore_patterns like many others tasks.
https://github.com/phpro/grumphp/blob/master/doc/tasks/git_blacklist.md

In my case I don't want to put the path for all the files/folders but I just want to exclude one single file.

[ghost]

Not tested yet: #1005 but it looked pretty straight forward.