add requirements

requirements.in

@@ -1 +1,2 @@
-PGPy
+PGPy
+bip-utils

requirements.txt

@@ -4,13 +4,35 @@
 #
 #    pip-compile ./requirements.in
 #
+bip-utils==2.10.0
+    # via -r requirements.in
+cbor2==5.8.0
+    # via bip-utils
 cffi==2.0.0
-    # via cryptography
+    # via
+    #   cryptography
+    #   pynacl
+coincurve==21.0.0
+    # via bip-utils
+crcmod==1.7
+    # via bip-utils
 cryptography==46.0.3
     # via pgpy
+ecdsa==0.19.1
+    # via bip-utils
+ed25519-blake2b==1.4.1
+    # via bip-utils
 pgpy==0.6.0
     # via -r requirements.in
+py-sr25519-bindings==0.2.3
+    # via bip-utils
 pyasn1==0.6.1
     # via pgpy
 pycparser==2.23
     # via cffi
+pycryptodome==3.23.0
+    # via bip-utils
+pynacl==1.6.2
+    # via bip-utils
+six==1.17.0
+    # via ecdsa