Make n8n work with older node versions (<10)

packages/nodes-base/nodes/ReadBinaryFile.node.ts

@@ -5,7 +5,12 @@ import {
 	INodeType,
 } from 'n8n-workflow';
 
-import { promises as fs } from 'fs';
+import {
+	readFile as fsReadFile,
+} from 'fs';
+import { promisify } from "util";
+
+const fsReadFileAsync = promisify(fsReadFile);
 
 
 export class ReadBinaryFile implements INodeType {
@@ -55,7 +60,7 @@ export class ReadBinaryFile implements INodeType {
 
 		let data;
 		try {
-			data = await fs.readFile(filePath) as Buffer;
+			data = await fsReadFileAsync(filePath) as Buffer;
 		} catch (error) {
 			if (error.code === 'ENOENT') {
 				throw new Error(`The file "${filePath}" could not be found.`);

packages/nodes-base/nodes/ReadBinaryFiles.node.ts

@@ -4,10 +4,17 @@ import {
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { promises as fs } from 'fs';
 import * as glob from 'glob-promise';
 import * as path from 'path';
 
+import {
+	readFile as fsReadFile,
+} from 'fs';
+import { promisify } from "util";
+
+const fsReadFileAsync = promisify(fsReadFile);
+
+
 export class ReadBinaryFiles implements INodeType {
 	description: INodeTypeDescription = {
 		displayName: 'Read Binary Files',
@@ -56,7 +63,7 @@ export class ReadBinaryFiles implements INodeType {
 		let data: Buffer;
 		let fileName: string;
 		for (const filePath of files) {
-			data = await fs.readFile(filePath) as Buffer;
+			data = await fsReadFileAsync(filePath) as Buffer;
 
 			fileName = path.parse(filePath).base;
 			item = {

packages/nodes-base/nodes/WriteBinaryFile.node.ts

@@ -8,7 +8,13 @@ import {
 	INodeExecutionData,
 	INodeType,
 } from 'n8n-workflow';
-import { promises as fs } from 'fs';
+
+import {
+	writeFile as fsWriteFile,
+} from 'fs';
+import { promisify } from "util";
+
+const fsWriteFileAsync = promisify(fsWriteFile);
 
 
 export class WriteBinaryFile implements INodeType {
@@ -62,7 +68,7 @@ export class WriteBinaryFile implements INodeType {
 		}
 
 		// Write the file to disk
-		await fs.writeFile(fileName, Buffer.from(item.binary[dataPropertyName].data, BINARY_ENCODING), 'binary');
+		await fsWriteFileAsync(fileName, Buffer.from(item.binary[dataPropertyName].data, BINARY_ENCODING), 'binary');
 
 		if (item.json === undefined) {
 			item.json = {};