Fix typing_extensions (#1556)

* change versions

* Move away from pyethereum dependency

* Remove leveldb

* Change requirements

* Add rzpad()

* Fix issues with sha3

* Fix sha3 edge cases

* Fix setup.py

* Restrict eth-utils

* Restrict eth-typing

* Fix py-ecc

* Fix typing_extensions

requirements.txt

@@ -29,7 +29,7 @@ requests
 rlp
 semantic_version
 transaction>=2.2.1
-typing_extensions
+typing-extensions<4,>=3.7.4
 z3-solver>=4.8.8.0
 pysha3
 matplotlib

setup.py

@@ -53,7 +53,7 @@ REQUIRED = [
     "persistent>=4.2.0",
     "ethereum-input-decoder>=0.2.2",
     "matplotlib",
-    "typing_extensions",
+    "typing-extensions<4,>=3.7.4",
     "py-evm",
     "certifi>=2020.06.20",
 ]