Error: strict mode: unknown keyword: "afterRequest" #335

/Users/harsh/Desktop/http-snippet-demo/node_modules/ajv/dist/compile/index.js:120
        throw e;
        ^

Error: strict mode: unknown keyword: "afterRequest"
    at checkStrictMode (/Users/harsh/Desktop/http-snippet-demo/node_modules/ajv/dist/compile/util.js:174:15)
    at checkUnknownRules (/Users/harsh/Desktop/http-snippet-demo/node_modules/ajv/dist/compile/util.js:32:13)
    at checkKeywords (/Users/harsh/Desktop/http-snippet-demo/node_modules/ajv/dist/compile/validate/index.js:120:34)
    at validateFunctionCode (/Users/harsh/Desktop/http-snippet-demo/node_modules/ajv/dist/compile/validate/index.js:19:9)
    at Ajv.compileSchema (/Users/harsh/Desktop/http-snippet-demo/node_modules/ajv/dist/compile/index.js:80:45)
    at Ajv.resolveSchema (/Users/harsh/Desktop/http-snippet-demo/node_modules/ajv/dist/compile/index.js:193:23)
    at Ajv.getSchema (/Users/harsh/Desktop/http-snippet-demo/node_modules/ajv/dist/core.js:279:43)
    at validateHarRequest (/Users/harsh/Desktop/http-snippet-demo/node_modules/httpsnippet/dist/helpers/har-validator.js:66:24)
    at /Users/harsh/Desktop/http-snippet-demo/node_modules/httpsnippet/dist/httpsnippet.js:262:56
    at Array.forEach (<anonymous>)

const express = require('express');
const { HTTPSnippet } = require('httpsnippet');

const app = express();

const snippet = new HTTPSnippet({
  method: 'GET',
  url: 'http://mockbin.com/request',
});

const options = { indent: '\t' };
const output = snippet.convert('shell', 'curl', options);
console.log(output);

const server = app.listen(8000, '0.0.0.0', () => {
  console.log('Example app listening at http://%s:%s', server.address().address, server.address().port);
});