camunda Spin JSON support

SpinJson.java

// read JSON from String
SpinJsonNode json = JSON("{\"name\": \"camunda\", \"version\": \"7.2.0-alpha3\"}");

// read JSON object property as String
String version = json.prop("version").stringValue();

// calculate new version
int newVersion = Integer.valueOf(version.substring(version.length() - 1)) + 1;
version = version.substring(0, version.length() - 1 ) + newVersion;

// set JSON object property
json.prop("version", version);

// return JSON as String
System.out.println(json.toString());