add support for guzzle http 6 and 7

v0.3.1

add support for guzzle http 6 and 7

Upgrade the guzzle and packages

v0.3.0

upgrade the guzzle http

Update the packages

v0.2.3

update the dependencies

Fix: check transaction status

Merge pull request #4 from moeen-basra/develop

add method to query the transaction for status

fix the version number in composer file

Merge pull request #3 from moeen-basra/develop

remover the version number from composer

add http client and refactor the packages

1. deprecated the old function
2. add implementation stub under public/package directory
3. add new tests.

Marchant Page 2

implement the merchant page 2