Bump json from 20201115 to 20210307

Bumps [json](https://github.com/douglascrockford/JSON-java) from 20201115 to 20210307.
- [Release notes](https://github.com/douglascrockford/JSON-java/releases)
- [Commits](https://github.com/douglascrockford/JSON-java/commits)

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

lib/build.gradle

@@ -43,7 +43,7 @@ dependencies {
     androidTestImplementation("androidx.test:runner:1.3.0")
     androidTestImplementation("androidx.test:rules:1.3.0")
     androidTestImplementation("com.willowtreeapps.assertk:assertk-jvm:$assertk_version")
-    androidTestImplementation("org.json:json:20201115")
+    androidTestImplementation("org.json:json:20210307")
 }
 
 afterEvaluate {