v1.2: Adds transaction lock timeout

Introduces a lock timeout for the startTransaction operation.

This prevents indefinite locking when starting a transaction.
Also defines a new error code for "another transaction in progress".

v1.1: Adds transaction check functionality

Adds the ability to check the state of a transaction.

This change introduces a new `checkTransaction` method that allows users to query the status of a specific transaction by its ID. It also updates the internal logic to handle `check_transaction` operations, including response parsing and callback execution.

v1.0.12

throw error and end loop

v1.0.11

sync call instead of async

v1.0.10

ramsey/uuid 4.2 for php 7 support

v1.0.9

fix

v1.0.8

fix

v1.0.7

improvements

v1.0.6

Update SobitEcr.php

v1.0.5

Update SobitEcr.php