update JUnit version to 6.0.3

Author: ralscha

.gitignore

@@ -6,3 +6,4 @@
 /.factorypath
 /.apt_generated/
 /.sts4-cache/
+/.vscode/

pom.xml

@@ -46,6 +46,7 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<junit.version>6.0.3</junit.version>
 	</properties>
 
 	<dependencyManagement>
@@ -115,26 +116,20 @@
 		<dependency>
 			<groupId>org.junit.platform</groupId>
 			<artifactId>junit-platform-launcher</artifactId>
-			<version>6.0.0</version>
+			<version>${junit.version}</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.junit.jupiter</groupId>
 			<artifactId>junit-jupiter-params</artifactId>
 			<scope>test</scope>
-			<version>6.0.3</version>
+			<version>${junit.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.junit.jupiter</groupId>
 			<artifactId>junit-jupiter-engine</artifactId>
 			<scope>test</scope>
-			<version>6.0.3</version>
-		</dependency>
-		<dependency>
-			<groupId>org.junit.platform</groupId>
-			<artifactId>junit-platform-runner</artifactId>
-			<version>1.14.0</version>
-			<scope>test</scope>
+			<version>${junit.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.assertj</groupId>
@@ -418,13 +413,6 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>3.5.5</version>
-                <dependencies>
-                    <dependency>
-						<groupId>org.apache.maven.surefire</groupId>
-						<artifactId>surefire-junit-platform</artifactId>
-						<version>3.5.5</version>
-                    </dependency>
-                </dependencies>
             </plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>