chore: Release env_logger version 0.10.0

bump version to 0.9.0

env_logger 0.8.4

Improvements:

* Allow writing logs to a custom output target (via `Target::Pipe`)

Bug fixes:

* Actually allow overriding filter levels using `env_logger::Builder`s
  methods, as documented

Update repository links and release 0.8.1

0.8.0