Bump nimbus-jose-jwt from 8.6 to 8.11

Bumps [nimbus-jose-jwt](https://bitbucket.org/connect2id/nimbus-jose-jwt) from 8.6 to 8.11.
- [Changelog](https://bitbucket.org/connect2id/nimbus-jose-jwt/src/master/CHANGELOG.txt)
- [Commits](https://bitbucket.org/connect2id/nimbus-jose-jwt/branches/compare/8.11..8.6)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

spring-security-rest/build.gradle

@@ -19,7 +19,7 @@ dependencies {
     //https://snyk.io/vuln/SNYK-JAVA-ORGBOUNCYCASTLE-472372
     compile 'org.bouncycastle:bcprov-jdk15on:1.64'
 
-    compile "com.nimbusds:nimbus-jose-jwt:8.6"
+    compile "com.nimbusds:nimbus-jose-jwt:8.11"
     compile 'commons-codec:commons-codec:1.14'
     compile "org.grails.plugins:spring-security-core:${springSecurityCoreVersion}"