Update auth0 dependencies (#80)

Author: jimmyjames

lib/build.gradle

@@ -34,8 +34,8 @@ compileJava {
 ext.springSecurityVersion = '4.2.20.RELEASE'
 
 dependencies {
-    api "com.auth0:java-jwt:3.19.3"
-    api "com.auth0:jwks-rsa:0.21.2"
+    api "com.auth0:java-jwt:3.19.4"
+    api "com.auth0:jwks-rsa:0.21.3"
     api "org.springframework.security:spring-security-core:${springSecurityVersion}"
     api "org.springframework.security:spring-security-web:${springSecurityVersion}"
     api "org.springframework.security:spring-security-config:${springSecurityVersion}"