Update README.md

Author: pitbulk

README.md

@@ -4,6 +4,10 @@
 Version `1.12.0` adds support for gcm algorithm and
 change/adds specific error messages for signature validations
 
+idp_sso_target_url and idp_slo_target_url attributes of the Settings class deprecated by idp_sso_service_url and idp_slo_service_url.
+At IDPMetadataParser, parse,parse_to_hash/parse_to_array methods now retrieve SSO URL and SLO URL endpoints as
+idp_sso_service_url and idp_slo_service_url instead idp_sso_target_url and idp_slo_target_url
+
 ## Updating from 1.10.x to 1.11.0
 Version `1.11.0` deprecates the use of `settings.issuer` in favour of `settings.sp_entity_id`.
 There are two new security settings: `settings.security[:check_idp_cert_expiration]` and `settings.security[:check_sp_cert_expiration]` (both false by default) that check if the IdP or SP X.509 certificate has expired, respectively.