Update parse name version parirs name to lower

src/Composer/Package/Version/VersionParser.php

@@ -54,10 +54,10 @@ class VersionParser extends SemverVersionParser
             }
 
             if (strpos($pair, ' ')) {
-                list($name, $version) = explode(" ", $pair, 2);
-                $result[] = array('name' => $name, 'version' => $version);
+                list($name, $version) = explode(' ', $pair, 2);
+                $result[] = array('name' => strtolower($name), 'version' => $version);
             } else {
-                $result[] = array('name' => $pair);
+                $result[] = array('name' => strtolower($pair));
             }
         }