Bump org.mockito:mockito-core from 5.7.0 to 5.8.0 (#59)

Bumps [org.mockito:mockito-core](https://github.com/mockito/mockito) from 5.7.0 to 5.8.0.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v5.7.0...v5.8.0)

---
updated-dependencies:
- dependency-name: org.mockito:mockito-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

divviup/build.gradle.kts

@@ -55,7 +55,7 @@ dependencies {
     testImplementation("ch.qos.logback:logback-core:1.4.12")
     testImplementation("ch.qos.logback:logback-classic:1.4.12")
     testImplementation("commons-io:commons-io:2.15.0")
-    testImplementation("org.mockito:mockito-core:5.7.0")
+    testImplementation("org.mockito:mockito-core:5.8.0")
     androidTestImplementation(project(":divviup:commontest"))
     androidTestImplementation("androidx.test.ext:junit:1.1.5")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")