Update com.nimbusds to 9.19

Closes gh-10491

Author: rwinch

dependencies/spring-security-dependencies.gradle

@@ -19,7 +19,7 @@ dependencies {
 		api "ch.qos.logback:logback-classic:1.2.7"
 		api "com.google.inject:guice:3.0"
 		api "com.nimbusds:nimbus-jose-jwt:9.14"
-		api "com.nimbusds:oauth2-oidc-sdk:9.18"
+		api "com.nimbusds:oauth2-oidc-sdk:9.19"
 		api "com.squareup.okhttp3:mockwebserver:3.14.9"
 		api "com.squareup.okhttp3:okhttp:3.14.9"
 		api "com.unboundid:unboundid-ldapsdk:4.0.14"