chore(deps): remove queueMicrotask dependency (#515)

Has broad enough platform support now.

Author: RubenVerborgh

package-lock.json

@@ -25,7 +25,6 @@
   ],
   "dependencies": {
     "buffer": "^6.0.3",
-    "queue-microtask": "^1.1.2",
     "readable-stream": "^4.0.0"
   },
   "devDependencies": {

package.json

@@ -1,6 +1,5 @@
 // **N3Lexer** tokenizes N3 documents.
 import { Buffer } from 'buffer';
-import queueMicrotask from 'queue-microtask';
 import namespaces from './IRIs';
 
 const { xsd } = namespaces;

src/N3Lexer.js

@@ -1,5 +1,4 @@
 import { Lexer } from '../src';
-import queueMicrotask from 'queue-microtask';
 
 import { EventEmitter } from 'events';