Bump junit-jupiter-api from 5.4.2 to 5.6.0

Bumps [junit-jupiter-api](https://github.com/junit-team/junit5) from 5.4.2 to 5.6.0.
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit-framework@r5.4.2...r5.6.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

build.gradle

@@ -45,7 +45,7 @@ dependencies {
     compile "org.mockito:mockito-core:$mockitoVersion"
     compile 'net.jodah:typetools:0.6.1'
 
-    testCompile 'org.junit.jupiter:junit-jupiter-api:5.4.2'
+    testCompile 'org.junit.jupiter:junit-jupiter-api:5.6.0'
     testRuntime 'org.junit.jupiter:junit-jupiter-engine:5.4.2'
     testCompile "org.mockito:mockito-junit-jupiter:$mockitoVersion"
     testCompile 'org.assertj:assertj-core:3.13.2'