Simplify dependency management for JUnit Jupiter (#4704)

By using the junit-jupiter aggregator artifact.

Author: marcphilipp

docs/quickstart/junit_5_quickstart.md

@@ -22,31 +22,16 @@ Let's start from here, and see how to improve the test with Testcontainers:
 First, add Testcontainers as a dependency as follows:
 
 ```groovy tab='Gradle'
-def junitJupiterVersion = '5.4.2'
-testImplementation "org.junit.jupiter:junit-jupiter-api:$junitJupiterVersion"
-testImplementation "org.junit.jupiter:junit-jupiter-params:$junitJupiterVersion"
-testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:$junitJupiterVersion"
+testImplementation "org.junit.jupiter:junit-jupiter:5.8.1"
 testImplementation "org.testcontainers:testcontainers:{{latest_version}}"
 testImplementation "org.testcontainers:junit-jupiter:{{latest_version}}"
 ```
 
 ```xml tab='Maven'
 <dependency>
     <groupId>org.junit.jupiter</groupId>
-    <artifactId>junit-jupiter-api</artifactId>
-    <version>5.4.2</version>
-    <scope>test</scope>
-</dependency>
-<dependency>
-    <groupId>org.junit.jupiter</groupId>
-    <artifactId>junit-jupiter-params</artifactId>
-    <version>5.4.2</version>
-    <scope>test</scope>
-</dependency>
-<dependency>
-    <groupId>org.junit.jupiter</groupId>
-    <artifactId>junit-jupiter-engine</artifactId>
-    <version>5.4.2</version>
+    <artifactId>junit-jupiter</artifactId>
+    <version>5.8.1</version>
     <scope>test</scope>
 </dependency>
 <dependency>