Bump json from 20201115 to 20210307 (#2485)

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>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

mobile/build.gradle

@@ -177,7 +177,7 @@ dependencies {
     testImplementation "org.mockito:mockito-core:3.8.0"
     testImplementation "com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0"
     testImplementation "junit:junit:4.13.2"
-    testImplementation "org.json:json:20201115"
+    testImplementation "org.json:json:20210307"
     testImplementation "org.reflections:reflections:0.9.12"
     testImplementation "com.squareup.okhttp3:mockwebserver:$ok_http_version"
     testImplementation "org.jetbrains.kotlinx:kotlinx-coroutines-test:$kotlin_coroutines_version"