Update to GWT 2.8.0

Author: j.schmied@pay-co.net

pom.xml

@@ -51,28 +51,28 @@
       <dependency>
         <groupId>com.google.gwt</groupId>
         <artifactId>gwt-dev</artifactId>
-        <version>2.7.0</version>
+        <version>2.8.0</version>
       </dependency>
       <dependency>
         <groupId>com.google.gwt</groupId>
         <artifactId>gwt-user</artifactId>
-        <version>2.7.0</version>
+        <version>2.8.0</version>
       </dependency>
 
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
-        <version>4.11</version>
+        <version>4.12</version>
       </dependency>
       <dependency>
         <groupId>org.mockito</groupId>
         <artifactId>mockito-core</artifactId>
-        <version>1.9.5</version>
+        <version>1.10.19</version>
       </dependency>
       <dependency>
         <groupId>org.javassist</groupId>
         <artifactId>javassist</artifactId>
-        <version>3.17.1-GA</version>
+        <version>3.20.0-GA</version>
       </dependency>
 
       <dependency>
@@ -87,7 +87,7 @@
       <dependency>
         <groupId>org.powermock</groupId>
       <artifactId>powermock-api-mockito</artifactId>
-      <version>1.5.1</version>
+      <version>1.6.6</version>
       <scope>test</scope>
       </dependency>
     </dependencies>
@@ -99,10 +99,10 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
-          <version>3.1</version>
+          <version>3.6.0</version>
           <configuration>
-            <source>1.6</source>
-            <target>1.6</target>
+            <source>1.8</source>
+            <target>1.8</target>
           </configuration>
         </plugin>
         <plugin>
@@ -121,7 +121,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-javadoc-plugin</artifactId>
-          <version>2.8.1</version>
+          <version>2.10.4</version>
           <configuration>
             <excludePackageNames>*.impl</excludePackageNames>
             <linksource>true</linksource>
@@ -135,7 +135,7 @@
         <plugin>
           <groupId>net.ltgt.gwt.maven</groupId>
           <artifactId>gwt-maven-plugin</artifactId>
-          <version>1.0-alpha-3</version>
+          <version>1.0-rc-6</version>
           <extensions>true</extensions>
         </plugin>
       </plugins>