Bump org.robolectric:robolectric from 4.8.1 to 4.9.2 (#19)

Bumps [org.robolectric:robolectric](https://github.com/robolectric/robolectric) from 4.8.1 to 4.9.2.
- [Release notes](https://github.com/robolectric/robolectric/releases)
- [Commits](robolectric/robolectric@robolectric-4.8.1...robolectric-4.9.2)

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

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

library/build.gradle

@@ -61,5 +61,5 @@ dependencies {
  testImplementation 'junit:junit:4.13.2'
  testImplementation 'androidx.test.ext:junit:1.1.5'
  testImplementation "io.mockk:mockk:1.12.3"
- testImplementation 'org.robolectric:robolectric:4.8.1'
+ testImplementation 'org.robolectric:robolectric:4.9.2'
 }