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>

build.gradle

@@ -22,7 +22,7 @@ dependencies {
     compile 'com.enonic.lib:lib-cache:2.1.1'
 
     compile group: 'org.jdom', name: 'jdom', version: '2.0.2'
-    compile group: 'org.json', name: 'json', version: '20201115'
+    compile group: 'org.json', name: 'json', version: '20210307'
     compile group: 'jaxen', name: 'jaxen', version: '1.2.0-atlassian-2'
 
     testCompile "com.enonic.xp:testing:${xpVersion}"