Your requirements could not be resolved to an installable set of packages.

[maykino]

Your requirements could not be resolved to an installable set of packages.

Problem 1
- Installation request for fillup/walmart-partner-api-sdk-php ^1.0.9 -> satisfiable by fillup/walmart-partner-api-sdk-php[1.0.9].
- fillup/walmart-partner-api-sdk-php 1.0.9 requires guzzlehttp/guzzle ^5.3.1 -> satisfiable by guzzlehttp/guzzle[5.3.1, 5.3.2, 5.3.3, 5.3.x-dev] but these conflict with your requirements or minimum-stability.

[joshfedo]

Same issue for me

[josephzidell]

Is this package being actively maintained? cc @fillup