Bump junit-jupiter-engine from 5.6.0 to 5.7.0 (#141)

Bumps [junit-jupiter-engine](https://github.com/junit-team/junit5) from 5.6.0 to 5.7.0.
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit5@r5.6.0...r5.7.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

junit-platform/build.gradle

@@ -28,7 +28,7 @@ dependencies {
     testCompile 'io.projectreactor:reactor-core:3.2.2.RELEASE'
 
     testCompile 'org.junit.jupiter:junit-jupiter-api:5.7.0'
-    testRuntime 'org.junit.jupiter:junit-jupiter-engine:5.6.0'
+    testRuntime 'org.junit.jupiter:junit-jupiter-engine:5.7.0'
 
     // FIXME remove once https://github.com/gradle/gradle/issues/8806 is fixed
     testRuntime 'org.junit.platform:junit-platform-launcher:1.0.0'