Add Trezor to Readme

README.md

@@ -156,6 +156,14 @@ Safe-cli Ledger commands:
 - `load_ledger_cli_owners [--legacy-accounts] [--derivation-path <str>]`: show a list of the first 5 accounts (--legacy-accounts search using ledger legacy derivation) or load an account from provided derivation path.
 
 **NOTE**: before signing anything ensure that the data showing on your ledger is the same as the safe-cli data.
+## Trezor module
+Trezor module is an optional feature of safe-cli to sign transactions from Trezor hardware wallet using the [trezor](https://pypi.org/project/trezor/).
+
+To enable, safe-cli must be installed as follows:
+```
+pip install safe-cli[trezor]
+```
+**NOTE**: before signing anything ensure that the data showing on your Trezor is the same as the safe-cli data.
 ## Creating a new Safe
 Use `safe-creator <node_url> <private_key> --owners <checksummed_address_1> <checksummed_address_2> --threshold <uint> --salt-nonce <uint256>`.
 

setup.py

@@ -27,7 +27,7 @@
         "safe-eth-py==6.0.0b8",
         "tabulate>=0.8",
     ],
-    extras_require={"ledger": ["ledgereth==0.9.1"]},
+    extras_require={"ledger": ["ledgereth==0.9.1"], "trezor": ["trezor==0.13.8"]},
     packages=setuptools.find_packages(),
     entry_points={
         "console_scripts": [