Bump mockito-core from 3.3.3 to 3.4.4

Bumps [mockito-core](https://github.com/mockito/mockito) from 3.3.3 to 3.4.4.
- [Release notes](https://github.com/mockito/mockito/releases)
- [Commits](mockito/mockito@v3.3.3...v3.4.4)

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

Author: dependabot-preview[bot]

build.gradle

@@ -28,7 +28,7 @@ dependencies {
     implementation 'com.google.code.gson:gson:2.8.6'
     testImplementation group: 'org.testng', name: 'testng', version: '7.1.0'
     testImplementation 'commons-io:commons-io:2.7'
-    testImplementation 'org.mockito:mockito-core:3.3.3'
+    testImplementation 'org.mockito:mockito-core:3.4.4'
     testImplementation "com.squareup.okhttp3:mockwebserver:4.8.0"
 }