Follow symlinks; allow whitespace chars in the scan command

[EpocDotFr]

Hello!

I made a PR to fix the following issues:

• Symbolic links aren't followed
  This allows to scan files in directories which are symlinked (i.e when locally developing a Composer package)
• The regex used by the Finder in the scan command isn't permissive enough to find translation methods laid out like this:

  trans(
      'group.message',
      ['fdsfd']
  );

  Simply allowing whitespace chars at specific places fixes the issue, as you can see in this snippet: https://regex101.com/r/MT9t0Y/1

The PR: #9