Update org.mockito to 3.12.4

Closes gh-10296

Author: rwinch

buildSrc/build.gradle

@@ -93,8 +93,8 @@ dependencies {
 	testImplementation "org.junit.jupiter:junit-jupiter-engine"
 	testImplementation 'org.apache.commons:commons-io:1.3.2'
 	testImplementation 'org.assertj:assertj-core:3.13.2'
-	testImplementation 'org.mockito:mockito-core:3.11.2'
-	testImplementation 'org.mockito:mockito-junit-jupiter:3.11.2'
+	testImplementation 'org.mockito:mockito-core:3.12.4'
+	testImplementation 'org.mockito:mockito-junit-jupiter:3.12.4'
 	testImplementation "com.squareup.okhttp3:mockwebserver:3.14.9"
 }
 

dependencies/spring-security-dependencies.gradle

@@ -56,9 +56,9 @@ dependencies {
 		api "org.hibernate:hibernate-entitymanager:5.5.7.Final"
 		api "org.hsqldb:hsqldb:2.6.0"
 		api "org.jasig.cas.client:cas-client-core:3.6.2"
-		api "org.mockito:mockito-core:3.11.2"
-		api "org.mockito:mockito-inline:3.11.2"
-		api "org.mockito:mockito-junit-jupiter:3.11.2"
+		api "org.mockito:mockito-core:3.12.4"
+		api "org.mockito:mockito-inline:3.12.4"
+		api "org.mockito:mockito-junit-jupiter:3.12.4"
 		api "org.openid4java:openid4java-nodeps:0.9.6"
 		api "org.opensaml:opensaml-core:$openSamlVersion"
 		api "org.opensaml:opensaml-saml-api:$openSamlVersion"