binaries: bundle 'cryptography' instead of 'pycryptodomex' in binaries

related: #6538

(this allows testing the binaries; to consider whether we can drop pycryptodomex)

contrib/requirements/requirements-binaries.txt

@@ -1,2 +1,2 @@
 PyQt5<5.15
-pycryptodomex>=3.7
+cryptography>=2.1

setup.py

@@ -53,7 +53,7 @@ if platform.system() in ['Linux', 'FreeBSD', 'DragonFly']:
 extras_require = {
     'hardware': requirements_hw,
     'gui': ['pyqt5'],
-    'crypto': ['pycryptodomex>=3.7'],
+    'crypto': ['cryptography>=2.1'],
     'tests': ['pycryptodomex>=3.7', 'cryptography>=2.1'],
 }
 # 'full' extra that tries to grab everything an enduser would need (except for libsecp256k1...)