[SECURITY] Bumping pretty_env_logger dependency

[Elizafox]

pretty_env_logger 0.4.0 depends on env_logger 0.7.1, which depends on atty.

atty has a long-standing security problem with unaligned reads and has not been fixed, it is likely abandoned. This is a long-standing issue.

Bumping pretty_env_logger to 0.5.0 will resolve the security problem.