Using RateLimiterPostgres + knex.js yields wrong data in db
Hi,
When using the RateLimiterPostgres + knex.js, i'm seeing wrong results written to the db when the points limit is exceeded. 

Code:
` const {RateLimiterPostgres} = require('rate-limiter-flexible');`
`let options = { storeClient: connection, storeType: `knex`,
                points: 2,
                duration: 0, 
                blockDuration: 60 * 60 * 24 * 365, 
                tableName: 'downloads_rate_limiter', 
                keyPrefix: 'downloadsrl',
                inmemoryBlockOnConsumed: 2,
                inmemoryBlockDuration: 60 * 60 * 24 * 365,
                tableCreated: true
              };`

`const rateLimiter = new RateLimiterPostgres(options);`

app.get('/hello', async (req, res) => {
`  try
  {
    await rateLimiter.consume(obj, 1);
     doSomeOperation();
  }
  catch (error) {
      if (error instanceof Error) {
        // Some Postgres error
        // Never happen if `insuranceLimiter` set up
        res.writeHead(500)
      } else {
        // Can't consume
         res.writeHead(429);
      }
      res.end(error.toString())
    }`
});

Now let's say i'm calling the 'hello' endpoint 3 times and looking the at points column in the db. After the first 2 times i will see the value 2, which is expected, but at the 3rd time and on i will start to see some random value, jumping from 2 to 6, then to 9 and 12 etc.

Can you please help me understand what is the reason for this behaviour? Seems like a bug.

Thanks!
Noam