Bump gradle from 4.1.2 to 4.1.3 (#2090)

Summary:
Bumps gradle from 4.1.2 to 4.1.3.

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Pull Request resolved: https://github.com/facebook/flipper/pull/2090

Reviewed By: mweststrate

Differential Revision: D27265541

Pulled By: passy

fbshipit-source-id: ff3d914cc6f360364811e0d1402b02ccc89c1a8b

build.gradle

@@ -11,7 +11,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.2'
+        classpath 'com.android.tools.build:gradle:4.1.3'
         classpath 'com.vanniktech:gradle-maven-publish-plugin:0.14.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$KOTLIN_VERSION"
         classpath "org.jetbrains.dokka:dokka-gradle-plugin:1.4.20"