Bump Maven dependencies

pom.xml

@@ -7,10 +7,10 @@
 	<packaging>war</packaging>
 
 	<properties>
-		<org.springframework-version>4.2.0.RELEASE</org.springframework-version>
-		<org.springframework.security-version>4.0.2.RELEASE</org.springframework.security-version>
-		<org.springframework.integration-mail-version>4.1.6.RELEASE</org.springframework.integration-mail-version>
-		<com.fasterxml.jackson-version>2.6.0</com.fasterxml.jackson-version>
+		<org.springframework-version>4.2.7.RELEASE</org.springframework-version>
+		<org.springframework.security-version>4.0.4.RELEASE</org.springframework.security-version>
+		<org.springframework.integration-mail-version>4.1.8.RELEASE</org.springframework.integration-mail-version>
+		<com.fasterxml.jackson-version>2.6.7</com.fasterxml.jackson-version>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<sonar.language>java</sonar.language>
 		<mobile.production.path>../arsnova-mobile/src/main/webapp/build/production/ARSnova</mobile.production.path>
@@ -257,12 +257,12 @@
 		<dependency>
 			<groupId>org.aspectj</groupId>
 			<artifactId>aspectjrt</artifactId>
-			<version>1.8.6</version>
+			<version>1.8.9</version>
 		</dependency>
 		<dependency>
 			<groupId>org.aspectj</groupId>
 			<artifactId>aspectjweaver</artifactId>
-			<version>1.8.6</version>
+			<version>1.8.9</version>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework</groupId>