Problem with installing on RaspberryPi
Hi, Thanks for your awesome module.
I installed bip_utils on my own PC ( Arch/Manjaro ) and it works just perfect.
But when I try to install it on my RPi 4 (with Raspberry Pi OS), I get errors:

```
(venv) pi@raspberrypi:~/Desktop/backer $ pip install bip_utils
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting bip_utils
  Using cached https://www.piwheels.org/simple/bip-utils/bip_utils-2.1.0-py3-none-any.whl (377 kB)
Collecting pynacl~=1.1
  Using cached https://www.piwheels.org/simple/pynacl/PyNaCl-1.4.0-cp39-cp39-linux_armv7l.whl (599 kB)
Collecting pycryptodome~=3.6
  Using cached https://www.piwheels.org/simple/pycryptodome/pycryptodome-3.12.0-cp35-abi3-linux_armv7l.whl (1.8 MB)
Collecting py-sr25519-bindings<2.0.0,>=0.1.3
  Using cached py_sr25519_bindings-0.1.4.tar.gz (13 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... error
    ERROR: Command errored out with exit status 1:
     command: /home/pi/Desktop/coinopal_backer/venv/bin/python /tmp/tmpk7ridpje_in_process.py prepare_metadata_for_build_wheel /tmp/tmpaymolx6g
         cwd: /tmp/pip-install-c6wxh9ub/py-sr25519-bindings_a7ba08a045b242d78cd2415ac56a67ce
    Complete output (6 lines):
    
    Cargo, the Rust package manager, is not installed or is not on PATH.
    This package requires Rust and Cargo to compile extensions. Install it through
    the system's package manager or via https://rustup.rs/
    
    Checking for Rust toolchain....
    ----------------------------------------
WARNING: Discarding https://files.pythonhosted.org/packages/64/82/f55600547af686b1ef3db123471493800ce6f9a61ac7a9e355b3bd6360aa/py_sr25519_bindings-0.1.4.tar.gz#sha256=5e12ca977014f148f4bfb6ba662f1529b15cc8ce030719d726c4e16a379e976e (from https://pypi.org/simple/py-sr25519-bindings/). Command errored out with exit status 1: /home/pi/Desktop/coinopal_backer/venv/bin/python /tmp/tmpk7ridpje_in_process.py prepare_metadata_for_build_wheel /tmp/tmpaymolx6g Check the logs for full command output.
  Using cached py_sr25519_bindings-0.1.3.tar.gz (13 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... error
    ERROR: Command errored out with exit status 1:
     command: /home/pi/Desktop/coinopal_backer/venv/bin/python /tmp/tmpb8bxbub1_in_process.py prepare_metadata_for_build_wheel /tmp/tmpx9wmg0wi
         cwd: /tmp/pip-install-c6wxh9ub/py-sr25519-bindings_200e206b958348f289959e8c88a18fe5
    Complete output (6 lines):
    
    Cargo, the Rust package manager, is not installed or is not on PATH.
    This package requires Rust and Cargo to compile extensions. Install it through
    the system's package manager or via https://rustup.rs/
    
    Checking for Rust toolchain....
    ----------------------------------------
WARNING: Discarding https://files.pythonhosted.org/packages/bd/32/1b0dd06842466d2e2f9d6af89752f8aafe4d8f85d7bdc5246cece985eb30/py_sr25519_bindings-0.1.3.tar.gz#sha256=8b72ac823b63adf30cd9596508773b93da5ae4a73fb869e1e27266fb3e7ddaea (from https://pypi.org/simple/py-sr25519-bindings/). Command errored out with exit status 1: /home/pi/Desktop/coinopal_backer/venv/bin/python /tmp/tmpb8bxbub1_in_process.py prepare_metadata_for_build_wheel /tmp/tmpx9wmg0wi Check the logs for full command output.
Collecting bip_utils
  Using cached https://www.piwheels.org/simple/bip-utils/bip_utils-2.0.2-py3-none-any.whl (375 kB)
Requirement already satisfied: ecdsa~=0.14 in ./venv/lib/python3.9/site-packages (from bip_utils) (0.17.0)
  Using cached https://www.piwheels.org/simple/bip-utils/bip_utils-2.0.1-py3-none-any.whl (370 kB)
  Using cached https://www.piwheels.org/simple/bip-utils/bip_utils-2.0.0-py3-none-any.whl (370 kB)
  Using cached https://www.piwheels.org/simple/bip-utils/bip_utils-1.11.1-py3-none-any.whl (157 kB)
Requirement already satisfied: pysha3 in ./venv/lib/python3.9/site-packages (from bip_utils) (1.0.2)
Requirement already satisfied: six>=1.9.0 in ./venv/lib/python3.9/site-packages (from ecdsa~=0.14->bip_utils) (1.16.0)
Installing collected packages: bip-utils
Successfully installed bip-utils-1.11.1
```