Update pyusb requirement from ~=1.1.0 to ~=1.1.1 (#75)

Updates the requirements on [pyusb](https://github.com/pyusb/pyusb) to permit the latest version.
- [Release notes](https://github.com/pyusb/pyusb/releases)
- [Commits](pyusb/pyusb@v1.1.0...v1.1.1)

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requirements.txt

@@ -5,6 +5,6 @@ pyserial~=3.5
 python-pppd==1.0.3
 python-sdk-auth~=0.3.0
 pyudev~=0.22.0
-pyusb~=1.1.0
+pyusb~=1.1.1
 psutil~=5.8.0
 requests~=2.25.1