options with parameters not always correctly passed to prove

I want to pass the `-I lib/` parameter to `prove` to make it look in another base directory for my files.

When I run `autoprove -I lib/`, the initial test run is OK and the parameter is passed to `prove` like this:
```
prove --norc -v -m -I lib/ ::
ALL PASSED
t/01.instance.t:
# Subtest: instance
# Subtest: inheritance
```

When I then change a file, `autoprove` picks up the change and runs `prove` again, but this time the `lib/` is missing from the `-I` parameter and gets replaced by the test to run, which completely breaks my tests:
```
prove --norc -v -m -I t/01.instance.t ::
3 planned, only 0 passed.
Failed test(s) in t/00.load.t: 1
Non-zero exit status: t/00.load.t
Failed test(s) in t/01.instance.t: 1 2
Non-zero exit status: t/01.instance.t
t/01.instance.t:
Can't locate object method "new" via package "Log::Dispatch::Desktop::Notify" (perhaps you forgot to load "Log::Dispatch::Desktop::Notify"?) at t/01.instance.t line 7.t/01.instance.t:
# Failed test 'use Log::Dispatch::Desktop::Notify;'
# at t/01.instance.t line 4.
# Tried to use 'Log::Dispatch::Desktop::Notify'.
# Error: Can't locate Log/Dispatch/Desktop/Notify.pm in @INC (you may need to install the Log::Dispatch::Desktop::Notify module) (@INC contains: /home/mitch/git/log-dispatch-desktop-notify/t/01.instance.t /home/mitch/perl5/lib/perl5/x86_64-linux-gnu-thread-multi /home/mitch/perl5/lib/perl5 /home/mitch/perl5/lib/perl5/x86_64-linux-gnu-thread-multi /home/mitch/perl5/lib/perl5 /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.22.1 /usr/local/share/perl/5.22.1 /usr/lib/x86_64-linux-gnu/perl5/5.22 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.22 /usr/share/perl/5.22 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base .) at t/01.instance.t line 4.
# BEGIN failed--compilation aborted at t/01.instance.t line 4.
# Subtest: instance
# No tests run!
# Failed test 'No tests run for subtest "instance"'
# at t/01.instance.t line 9.
# Looks like your test exited with 255 just after 2.

------------------------------------------------------------

```

It looks like `Test::Continuous::_classify_opts()` splits the parameters by type so that `-I` ends up in `@not_files` while `lib/` ends up in `@tests` (because it is a directory).

Both `-I` and `lib/` should instead end up in `@not_files` to be passed to `prove` without any changes.