Bump system-stubs-jupiter from 1.2.0 to 2.0.0

Bumps [system-stubs-jupiter](https://github.com/webcompere/system-stubs) from 1.2.0 to 2.0.0.
- [Release notes](https://github.com/webcompere/system-stubs/releases)
- [Changelog](https://github.com/webcompere/system-stubs/blob/main/History.md)
- [Commits](https://github.com/webcompere/system-stubs/commits)

---
updated-dependencies:
- dependency-name: uk.org.webcompere:system-stubs-jupiter
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

dependencies.gradle

@@ -100,7 +100,7 @@ final Map<String, String> libraries = [
   spring              : 'org.springframework:spring-core:4.3.30.RELEASE',
   springSecurity      : 'org.springframework.security:spring-security-config:4.2.20.RELEASE',
   springTestJunit5    : 'com.github.sbrannen:spring-test-junit5:1.5.0',
-  systemStubs         : 'uk.org.webcompere:system-stubs-jupiter:1.2.0',
+  systemStubs         : 'uk.org.webcompere:system-stubs-jupiter:2.0.0',
   testcontainers      : 'org.testcontainers:testcontainers:1.16.3',
   tinybundles         : 'org.ops4j.pax.tinybundles:tinybundles:3.0.0',
   tokenBucket         : 'org.isomorphism:token-bucket:1.7',