Updating driver to usb-device 0.3.0

[ryan-summers]

This PR bumps the usb-device version used to 0.3.0, which I just released earlier today. I've tested these changes on Stabilizer with a USB-CDC-ACM port and verified things work as expected.

Most of the changes are from rustfmt here.

[Disasm]

Thanks! I merged a PR which enforces rustfmt checks: #40
Could you rebase your PR to make the diff simpler?

[ryan-summers]

Should be much smaller now, thanks for the rustfmt checks! :)

[ryan-summers]

Ping back over to @Disasm - if you don't have time, I'll merge and release later today/this week, so no worries. Thanks for helping!

[Disasm]

Hi! I started testing the proposed changes to the driver with the variety of boards I have. The test plan is quite big and it also includes #25 which I wanted to integrate before the 0.3.0 release. So far testing is complete by ~25%. If you think that the release should be prioritized, then I can prioritize testing of this update, but otherwise my plan is to finish testing on weekend this or next week.

[ryan-summers]

Hmm, personally I'd be more inclined to release early and often, and we can add in that support once its fully tested. It won't change any of the API, so it would be simple enough to include that in a patch release. What are your thoughts on that?

[Disasm]

That's what I want to make sure: that usb-device 0.3.0 is fully tested together with this driver :) Ok, I will test this update next, then let's make a new release of synopsys-usb-otg and then I'll proceed with other updates.

[Disasm]

Test results:

• now one of the test_class tests fails because isochronous endpoints are not implemented
• serial test fails with timeout for HighSpeed devices (not sure yet what is the reason, may be a regression in usbd-serial)
• compliance tests fail (tests 9.4, 9.9, 9.21) - all these tests failed before the update
• enumeration fails with FS peripheral on STM32F723 (STM32F723 example with OTG_FS doesn't work with v0.2.4 #24)
• HighSpeed devices fail to pass the compliance tests -- same as before the update

[Disasm]

I found that serial test behavior depends on the USB port type used: test passes if USB 2.0 port is used, fails if USB 3.0 port is used. And this is also a bug which was present in older versions of synopsys-usb-otg.