Normalize password rules and hashing

[thinkverse]

Normalized the password rules in profile to use Laravel's defaults, which makes defining default password rules easier and updated the hashing method from bcrypt to Laravel's Hash::make to match how the password is originally hashed, which also makes it easier to change algorithms later.

The default is min:8 so it could be removed from the rules.

[devajmeireles]

Thanks, @thinkverse !