composer.json requires lower case

[rasos]

In the actual composer version all has to be lower case. In addition, I had to use an older version of analog to work with php 7.1. So this worked for me:

{
  "name": "mekong/wpsparql",
  "version": "0.9.0",
  "description": "A wordpress plugin for querying data from an SPARQL endpoint into WP",
  "repositories": [
    {
      "type": "vcs",
      "url": "https://github.com/byjg/PHP-SPARQL-Lib.git"
    }
  ],
  "require": {
    "analog/analog": "1.0.16-stable",
    "byjg/sparqllib": "dev-master",
    "fortawesome/font-awesome": "*"
  }
}