Bump perf-plugin from 1.4.1 to 1.4.2

Bumps perf-plugin from 1.4.1 to 1.4.2.

---
updated-dependencies:
- dependency-name: com.google.firebase:perf-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -13,7 +13,7 @@ buildscript {
         // in the individual module build.gradle files
         classpath 'com.google.gms:google-services:4.3.13'
         classpath 'com.google.firebase:firebase-crashlytics-gradle:2.9.2'
-        classpath 'com.google.firebase:perf-plugin:1.4.1'
+        classpath 'com.google.firebase:perf-plugin:1.4.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }