Bump robolectric down.

Author: vkryachko

transport/transport-backend-cct/transport-backend-cct.gradle

@@ -69,7 +69,7 @@ dependencies {
     testImplementation 'com.github.tomakehurst:wiremock:2.26.3'
     //Android compatible version of Apache httpclient.
     testImplementation 'org.apache.httpcomponents:httpclient-android:4.3.5.1'
-    testImplementation 'org.robolectric:robolectric:4.3.1'
+    testImplementation 'org.robolectric:robolectric:4.2'
     testImplementation 'junit:junit:4.13-beta-2'
 
     androidTestImplementation 'androidx.test:runner:1.2.0'
@@ -78,4 +78,4 @@ dependencies {
 
 tasks.withType(Test) {
     systemProperty 'javax.net.ssl.trustStore', 'NONE'
-}
+}