Bump org.robolectric:robolectric from 4.12.2 to 4.13

Bumps [org.robolectric:robolectric](https://github.com/robolectric/robolectric) from 4.12.2 to 4.13.
- [Release notes](https://github.com/robolectric/robolectric/releases)
- [Commits](robolectric/robolectric@robolectric-4.12.2...robolectric-4.13)

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

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

gradle/libs.versions.toml

@@ -19,7 +19,7 @@ androidx-test-junit = "androidx.test.ext:junit:1.2.1"
 androidx-test-espresso = "androidx.test.espresso:espresso-core:3.6.1"
 google-material = "com.google.android.material:material:1.12.0"
 junit = "junit:junit:4.13.2"
-robolectric = "org.robolectric:robolectric:4.12.2"
+robolectric = "org.robolectric:robolectric:4.13"
 
 [plugins]
 android = { id = "com.android.application", version.ref = "agp" }