Add WebWorker support for LiteBuffer

[ygrill-astek]

LiteBuffer isn't supported in WebWorker context as the code use window object which is undefined in WebWorker

Solution which seems to work for me
Use following code in LiteBuffer.js

if (typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope) {
  Object.defineProperty(WorkerGlobalScope, 'Buffer', {
    configurable: true,
    enumerable: false,
    value: Buffer,
    writable: true,
  });
} else {
  Object.defineProperty(window, 'Buffer', {
    configurable: true,
    enumerable: false,
    value: Buffer,
    writable: true,
  });

}

instead of only

Object.defineProperty(window, 'Buffer', {
     configurable: true,
     enumerable: false,
     value: Buffer,
     writable: true,
   });