Bump espresso-core from 3.3.0 to 3.4.0

Bumps espresso-core from 3.3.0 to 3.4.0.

---
updated-dependencies:
- dependency-name: androidx.test.espresso:espresso-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

app/build.gradle

@@ -44,7 +44,7 @@ dependencies {
     implementation 'com.android.volley:volley:1.2.0'
     implementation 'androidx.appcompat:appcompat:1.2.0'
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
     implementation 'com.google.firebase:firebase-analytics:19.0.1'
     implementation 'com.google.firebase:firebase-crashlytics:18.2.1'
     implementation 'com.google.firebase:firebase-perf:19.1.1'