return public key unless private was requested (private default)

Author: jschlyter

src/cryptojwt/jwk.py

@@ -407,6 +407,9 @@ def get_key(self, **kwargs):
         if not self.key:
             self.deserialize()
 
+        if not kwargs.get('private', True):
+            return self.key.public_key()
+
         return self.key
 
     def verify(self):