chore(deps): bump realm-gradle-plugin from 5.12.0 to 5.13.0 (#2318)

Bumps [realm-gradle-plugin](https://github.com/realm/realm-java) from 5.12.0 to 5.13.0.
- [Release notes](https://github.com/realm/realm-java/releases)
- [Changelog](https://github.com/realm/realm-java/blob/master/CHANGELOG.md)
- [Commits](realm/realm-java@v5.12.0...v5.13.0)

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

Author: dependabot-preview[bot]

build.gradle

@@ -9,7 +9,7 @@ buildscript {
         classpath "com.android.tools.build:gradle:3.4.2"
         classpath "com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4"
         classpath "com.github.dcendents:android-maven-gradle-plugin:2.1"
-        classpath "io.realm:realm-gradle-plugin:5.12.0"
+        classpath "io.realm:realm-gradle-plugin:5.13.0"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.41"
 
         // NOTE: Do not place your application dependencies here; they belong