chore(deps-dev): bump testng

Bumps [testng](https://github.com/cbeust/testng) from 6.8.8 to 7.7.0.
- [Release notes](https://github.com/cbeust/testng/releases)
- [Changelog](https://github.com/cbeust/testng/blob/master/CHANGES.txt)
- [Commits](https://github.com/cbeust/testng/compare/testng-6.8.8...7.7.0)

---
updated-dependencies:
- dependency-name: org.testng:testng
  dependency-type: direct:development
...

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

main/plugins/org.talend.designer.components.libs/libs_src/adal4j/pom.xml

@@ -126,7 +126,7 @@
 		<dependency>
 			<groupId>org.testng</groupId>
 			<artifactId>testng</artifactId>
-			<version>6.8.8</version>
+			<version>7.7.0</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>