add upper pin to hexbytes dep due to incoming breaking update in 0.4.0

Author: pacrob

setup.py

@@ -74,7 +74,7 @@
         "eth-hash[pycryptodome]>=0.5.1",
         "eth-typing>=3.0.0",
         "eth-utils>=2.1.0",
-        "hexbytes>=0.1.0",
+        "hexbytes>=0.1.0,<=0.3.1",
         "jsonschema>=4.0.0",
         "lru-dict>=1.1.6",
         "protobuf>=4.21.6",