Issue with structured logging - Seq

[olakara]

Describe the bug
When using Seq logging (I am using the package bunyan-seq to create a custom stream) The string interpolation / variable substitution does not work

To Reproduce
Steps to reproduce the behavior:

1. Include bunyan-seq package to your project along with @nest-toolbox/bunyan-logger
2. Setup the logging service as mentioned below in the main.ts
3. In the controller's create an instance of Logger from @nestjs/common
4. call the logger methods as described below and see the results

Expected behavior
When logging with the following statement:
this.logger.warn('{user} tried access the {service} service with an expired key!',{ user: 'E73882', service: 'PurchaseOrder'});
the output in the log should be
E73882 tried access the PurchaseOrder service with an expired key!

Screenshots
What happens is:

Additional context
Here is my main.ts:

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';

const seq = require('bunyan-seq');

async function bootstrap() {
  const app = await NestFactory.create(AppModule,{
    bufferLogs: true,
  });

  app.useLogger(new BunyanLoggerService({      
        projectId: 'NestJS-Microservice',
        formatterOptions: {
          outputMode: 'json',
        },
        customStreams:[seq.createStream({serverUrl: 'http://localhost:5341', apiKey: '123456789'})]  ,
        extraFields: {
          app: 'extra-field-app',
          sample: 'extra-field-sample'
        }    
    }));

  await app.listen(3000);
}
bootstrap();`


In the controller in just create a Logger instance as follows and uses it:


`private readonly logger = new Logger('AppController');`

Examples:
 `this.logger.warn('English hello {lang}',{ lang: 'en' });    `