Don't use through2 in prettyPrint

server/logging/prettyPrint.ts

@@ -1,7 +1,7 @@
 import chalk from "chalk";
 import * as pump from "pump";
 import * as split from "split2";
-import * as through from "through2";
+import { Transform, TransformCallback } from "stream";
 
 type Level = "default" | 60 | 50 | 40 | 30 | 20 | 10;
 
@@ -121,7 +121,8 @@ function asColoredLevel(value: any) {
     }
 }
 
-const prettyTransport = through.obj((chunk, enc, cb) => {
+class PrettyPrintTranform extends Transform {
+    _transform(chunk: any, encoding: string, cb: TransformCallback) {
         let value: any;
         try {
             value = JSON.parse(chunk.toString());
@@ -135,6 +136,7 @@ const prettyTransport = through.obj((chunk, enc, cb) => {
         }
         process.stdout.write(line);
         cb();
-});
+    }
+}
 
-pump(process.stdin, split(), prettyTransport);
+pump(process.stdin, split(), new PrettyPrintTranform());