Updates to build sucessfully - breaking changes in Firebase and SendGrid

src/main/java/io/kamax/mxisd/threepid/notification/BuiltInNotificationHandlerSupplier.java

@@ -65,9 +65,12 @@ public class BuiltInNotificationHandlerSupplier implements NotificationHandlerSu
         if (StringUtils.equals(EmailRawNotificationHandler.ID, handler)) {
             Object o = mxisd.getConfig().getThreepid().getMedium().get(ThreePidMedium.Email.getId());
             if (Objects.nonNull(o)) {
-                EmailConfig emailCfg;
+                Object cfgJson = mxisd.getConfig().getNotification().getHandlers().get(handler); // Assuming this gives you the JSON config for Email.
+                EmailConfig emailCfg; // Declare outside the try-catch.
+                EmailSendGridConfig cfg; // Declare cfg here if needed for other purposes.
                 try {
-                    emailCfg = GsonUtil.get().fromJson(GsonUtil.makeObj(o), EmailConfig.class);
+                    emailCfg = GsonUtil.get().fromJson(GsonUtil.get().toJson(o), EmailConfig.class); // Assuming 'o' contains the EmailConfig JSON.
+                    // Additional configurations or initializations can go here.
                 } catch (JsonSyntaxException e) {
                     throw new ConfigurationException("Invalid configuration for threepid email notification");
                 }