deps: Allow older versions

We bumped deps, but didn't need to restrict to all of the new versions.
Some older versions can still be used, so allow them.

Author: achow101

pyproject.toml

@@ -22,7 +22,7 @@ ecdsa = "~0"
 pyaes = "^1.6"
 mnemonic = "~0"
 typing-extensions = "^3.7"
-libusb1 = "^2.0"
+libusb1 = ">=1.7,<3"
 pyside2 = { version = "^5.14.0", optional = true, python = "<3.10" }
 bitbox02 = ">=5.3.0,<6.0.0"
 
@@ -32,9 +32,9 @@ qt = ["pyside2"]
 [tool.poetry.dev-dependencies]
 pyinstaller = "^4.0"
 autopep8 = "~1"
-flake8 = "~4"
+flake8 = ">=3"
 mypy = "~0"
-sphinx = "~4"
+sphinx = ">=4"
 sphinx-rtd-theme = "~1"
 sphinxcontrib-autoprogram = "~0"