Root composer.json requires saintsystems/odata-client ^0.2.6 -> satisfiable by saintsystems/odata-client[0.2.6].
saintsystems/odata-client 0.2.6 requires guzzlehttp/guzzle ^6.2 -> found guzzlehttp/guzzle[6.2.0, ..., 6.5.x-dev] but it conflicts with your root composer.json require (^7.0.1).
`
How to fix this problem?
` Problem 1