Bump junit from 4.12 to 4.13

Bumps [junit](https://github.com/junit-team/junit4) from 4.12 to 4.13. - [Release notes](https://github.com/junit-team/junit4/releases) - [Changelog](https://github.com/junit-team/junit4/blob/master/doc/ReleaseNotes4.12.md) - [Commits](junit-team/junit4@r4.12...r4.13) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

lib/build.gradle

@@ -30,7 +30,7 @@ dependencies {
  implementation "androidx.appcompat:appcompat:$appcompat_version"
  implementation "androidx.core:core-ktx:$core_version"
  implementation "com.google.android.material:material:$material_version"
- testImplementation 'junit:junit:4.12'
+ testImplementation 'junit:junit:4.13'
  androidTestImplementation 'androidx.test:runner:1.2.0'
  androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
 }

sample/build.gradle

@@ -29,7 +29,7 @@ dependencies {
  implementation "androidx.core:core-ktx:$core_version"
  implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
  implementation "com.google.android.material:material:$material_version"
- testImplementation 'junit:junit:4.12'
+ testImplementation 'junit:junit:4.13'
  androidTestImplementation 'androidx.test:runner:1.2.0'
  androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
 }