Bump core-testing from 2.0.1 to 2.1.0

Bumps core-testing from 2.0.1 to 2.1.0.

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

build.gradle

@@ -318,7 +318,7 @@ dependencies {
     testImplementation 'org.powermock:powermock-api-mockito2:2.0.2'
     testImplementation 'org.json:json:20190722'
     testImplementation "com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0"
-    testImplementation "androidx.arch.core:core-testing:2.0.1"
+    testImplementation "androidx.arch.core:core-testing:2.1.0"
 
     // dependencies for instrumented tests
     // JUnit4 Rules