Add autoload-dev composer section (#724)

* Add autoload-dev composer section

* Remove redundant code from bootstrap for tests

Author: bekh6ex

composer.json

@@ -41,6 +41,15 @@
 			"Wikibase\\DataModel\\": "src/"
 		}
 	},
+	"autoload-dev": {
+		"psr-4": {
+			"Wikibase\\DataModel\\Fixtures\\": "tests/fixtures",
+			"Wikibase\\DataModel\\Tests\\": [
+				"tests/unit",
+				"tests/component"
+			]
+		}
+	},
 	"extra": {
 		"branch-alias": {
 			"dev-master": "7.0.x-dev"

tests/bootstrap.php

@@ -18,9 +18,4 @@
 	die( 'You need to install this package with Composer before you can run the tests' );
 }
 
-$classLoader = require __DIR__ . '/../vendor/autoload.php';
-
-$classLoader->addPsr4( 'Wikibase\\DataModel\\Tests\\', __DIR__ . '/unit/' );
-$classLoader->addPsr4( 'Wikibase\\DataModel\\Fixtures\\', __DIR__ . '/fixtures/' );
-
-unset( $classLoader );
+require __DIR__ . '/../vendor/autoload.php';