fix: parliament now supports piping individual files via stdin

[rossreicks]

Update call to parliament to work with versions greater than 0.4.6.

Rather than using the --file keyword, use the pipe operator to pass the file via stdin. For some reason the command substitution is causing the parliament library to think there is a stdin being passed in and its throwing the below error

This fixed the error:

parliament: error: You cannot pass a file with --file and use stdin together

Will resolve the following issue