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#### Section/Content To Improve
https://github.com/axios/axios/blob/master/CHANGELOG.md

#### Suggested Improvement
Please add 0.21.1 to the Changelog.

#### Relevant File(s)
https://github.com/axios/axios/blob/master/CHANGELOG.md
dist/axios.js
if (typeof executor !== 'function') {
	    throw new TypeError('executor must be a function.');
	  }
	
	  var resolvePromise;
	  this.promise = new Promise(function promiseExecutor(resolve) {
	    resolvePromise = resolve;
	  });
	
	  var token = this;
	  executor(function cancel(message) {
	    if (token.reason) {
	      
	      return;
	    }
	
	    token.reason = new Cancel(message);
	    resolvePromise(token.reason);
	  });
	}