Unable to update laravel due to dependency conflicts

[baselshlewett]

As shown in error below, must update package to use psr/http-message ^2.0

  Problem 1
    - Root composer.json requires aws/aws-sdk-php ^3.338 -> satisfiable by aws/aws-sdk-php[3.338.0, 3.338.1, 3.338.2].
    - joelbutcher/facebook-graph-sdk[v6.0.0, ..., v6.0.2] require psr/http-message ^1.0 -> satisfiable by psr/http-message[1.0, 1.0.1, 1.1].
    - You can only install one version of a package, so only one of these can be installed: psr/http-message[1.0, 1.0.1, 1.1, 2.0].
    - joelbutcher/laravel-facebook-graph v1.3.0 requires joelbutcher/facebook-graph-sdk ^6.0.0 -> satisfiable by joelbutcher/facebook-graph-sdk[v6.0.0, v6.0.1, v6.0.2].
    - aws/aws-sdk-php[3.338.0, ..., 3.338.2] require psr/http-message ^2.0 -> satisfiable by psr/http-message[2.0].
    - Root composer.json requires joelbutcher/laravel-facebook-graph ^1.3 -> satisfiable by joelbutcher/laravel-facebook-graph[v1.3.0].```

[joelbutcher]

Resolved with #29