Update some dev dependendencies

Author: Eivind Bergstøl

pom.xml

@@ -116,7 +116,7 @@
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter-api</artifactId>
-      <version>5.9.0</version>
+      <version>5.11.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>
@@ -150,12 +150,12 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0-M5</version>
+        <version>3.5.0</version>
       </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-jar-plugin</artifactId>
-        <version>3.2.0</version>
+        <version>3.4.2</version>
         <configuration>
           <archive>
             <manifestEntries>
@@ -243,9 +243,8 @@
 
   <properties>
     <!-- Dependency version -->
-    <maven.compiler.source>1.8</maven.compiler.source>
-    <maven.compiler.target>1.8</maven.compiler.target>
-    <maven.compiler.release>1.8</maven.compiler.release>
+    <maven.compiler.source>8</maven.compiler.source>
+    <maven.compiler.target>8</maven.compiler.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>