Replace through2 with Node stream.Transform

Author: kcastellino

concatjson.js

@@ -1,5 +1,5 @@
 'use strict'
-const thru = require('through2')
+const { Transform } = require('stream')
 const split = require('split2')
 
 function parse () {
@@ -38,13 +38,17 @@ function parse () {
 }
 
 function serialize () {
-  return thru.obj((chunk, enc, cb) => {
+  return new Serializer({ objectMode: true })
+}
+
+class Serializer extends Transform {
+  _transform (chunk, enc, cb) {
     try {
       return cb(null, JSON.stringify(chunk))
     } catch (err) {
       return cb(err)
     }
-  })
+  }
 }
 
 module.exports = {

package-lock.json

@@ -25,8 +25,7 @@
     "node": ">= 12.0.0"
   },
   "dependencies": {
-    "split2": "^4.2.0",
-    "through2": "^4.0.2"
+    "split2": "^4.2.0"
   },
   "devDependencies": {
     "standard": "^8.6.0",