Update py-datastruct to v2.0.0 on Python 3.8+

Author: kuba2k2

pyproject.toml

@@ -9,7 +9,10 @@ license = "MIT"
 python = "^3.7"
 pyserial = "^3.5"
 pycryptodome = {version = "^3.16.0", optional = true}
-py-datastruct = "^1.0.0"
+py-datastruct = [
+    { version = "^1.0.0", python = "<=3.7" },
+    { version = "^2.0.0", python = ">=3.8" }
+]
 
 [tool.poetry.extras]
 cli = ["pycryptodome"]