fix build error

packages/components/nodes/tools/RequestsPost/core.ts

@@ -1,4 +1,5 @@
 import { Tool } from 'langchain/tools'
+import fetch from 'node-fetch'
 
 export const desc = `Use this when you want to POST to a website.
 Input should be a json string with two keys: "url" and "data".
@@ -53,12 +54,15 @@ export class RequestsPostTool extends Tool {
                 inputUrl = url
                 inputBody = data
             }
+
             if (process.env.DEBUG === 'true') console.info(`Making POST API call to ${inputUrl} with body ${JSON.stringify(inputBody)}`)
+
             const res = await fetch(inputUrl, {
                 method: 'POST',
                 headers: this.headers,
                 body: JSON.stringify(inputBody)
             })
+
             const text = await res.text()
             return text.slice(0, this.maxOutputLength)
         } catch (error) {