ecc: API changes: verify_message_hash to return bool instead of raising

verify_message_hash and verify_message_for_address now return bool
instead of raising Exceptions on bad signatures.

electrum/plugins/coldcard/coldcard.py

@@ -43,11 +43,7 @@ try:
             # verify a signature (65 bytes) over the session key, using the master bip32 node
             # - customized to use specific EC library of Electrum.
             pubkey = BIP32Node.from_xkey(expect_xpub).eckey
-            try:
-                pubkey.verify_message_hash(sig[1:65], self.session_key)
-                return True
-            except:
-                return False
+            return pubkey.verify_message_hash(sig[1:65], self.session_key)
 
 except ImportError as e:
     if not (isinstance(e, ModuleNotFoundError) and e.name == 'ckcc'):