codegen performance: use trim-right instead of lodash/trimEnd (#5255)

packages/babel-generator/src/buffer.js

@@ -1,5 +1,5 @@
 import type SourceMap from "./source-map";
-import trimEnd from "lodash/trimEnd";
+import trimRight from "trim-right";
 
 const SPACES_RE = /^[ \t]+$/;
 
@@ -40,7 +40,9 @@ export default class Buffer {
 
     const map = this._map;
     const result = {
-      code: trimEnd(this._buf.join("")),
+      // Whatever trim is used here should not execute a regex against the
+      // source string since it may be arbitrarily large after all transformations
+      code: trimRight(this._buf.join("")),
       map: null,
       rawMappings: map && map.getRawMappings(),
     };