Bump uk.org.webcompere:system-stubs-jupiter from 2.1.7 to 2.1.8

Bumps [uk.org.webcompere:system-stubs-jupiter](https://github.com/webcompere/system-stubs) from 2.1.7 to 2.1.8.
- [Release notes](https://github.com/webcompere/system-stubs/releases)
- [Changelog](https://github.com/webcompere/system-stubs/blob/main/History.md)
- [Commits](webcompere/system-stubs@system-stubs-parent-2.1.7...system-stubs-parent-2.1.8)

---
updated-dependencies:
- dependency-name: uk.org.webcompere:system-stubs-jupiter
  dependency-version: 2.1.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Diff for: dropwizard-guicey/build.gradle

@@ -27,7 +27,7 @@ dependencies {
     testImplementation 'io.dropwizard:dropwizard-forms'
     testImplementation 'org.glassfish.jersey.ext:jersey-proxy-client'
     testImplementation 'org.junit.platform:junit-platform-testkit'
-    testImplementation 'uk.org.webcompere:system-stubs-jupiter:2.1.7'
+    testImplementation 'uk.org.webcompere:system-stubs-jupiter:2.1.8'
     testImplementation 'com.google.truth:truth:1.4.4'
     testImplementation 'org.objenesis:objenesis:3.4'
     // test rest stubs

Diff for: guicey-admin-rest/build.gradle

@@ -1,5 +1,5 @@
 description = "Mirror rest in admin context"
 
 dependencies {
-    testImplementation 'uk.org.webcompere:system-stubs-jupiter:2.1.7'
+    testImplementation 'uk.org.webcompere:system-stubs-jupiter:2.1.8'
 }

Diff for: guicey-spa/build.gradle

@@ -3,6 +3,6 @@ description = "Singe page applications support"
 dependencies {
     implementation 'io.dropwizard:dropwizard-assets'
 
-    testImplementation 'uk.org.webcompere:system-stubs-jupiter:2.1.7'
+    testImplementation 'uk.org.webcompere:system-stubs-jupiter:2.1.8'
     testImplementation 'org.objenesis:objenesis:3.4'
 }