v1.2.0

• New (additional) methods:
  • createMany()
  • refreshMany()
  • updateMany()
  • deleteMany()
• request parameter will now accept an array of requests (to forkJoin() them) in:
  • createMany()
  • readMany()
  • refreshMany()
  • updateMany()
  • deleteMany()
    Requests with suffix *many will run in parallel (using forkJoin()). If you need to run them differently, you can use regular methods with the creation operator of your choice.
• A function can be used as a value for the comparator field in configuration options or as an argument for setComparator() method;
• New method for override: postInit() - will be called in the next microtask after constructor().
  You can override and use it to call the methods declared in the subclass and still don't bother about constructor() overriding;
• getTrackByFieldFn() helper will not use fields with empty values;
• Jest has been configured to run tests in this repo - pull requests are welcome!