integer and float configs are not passed in laconia context

Describe the bug Float and Integer configs are not included in laconia context.

To Reproduce In lambda environment, I defined LACONIA_CONFIG_KEY_EXPIRATION: integer:10000,

const instance = ({ keyExpiration }) => ({
    myService: new MyService(keyExpiration)
})

const _handler = laconia(apig(app))
  .register(envVarInstances())
  .register(instance)

Expected behavior keyExpiration should be available in laconia context

Actual behavior keyExpiration is not in laconia context

Additional context IntegerConfigConverter and FloatConfigConverter are not registered in EnvVarConfigFactory

[reestolonio]

PR is in #638

[reestolonio]

I can submit a PR for this.