ResourceLoader: Update cssjanus/cssjanus to wikimedia/cssjanus

No rel-note since it is the same version as before.

Ref Iebe1ee249d738c956b8 in php-cssjanus.git.
Ref https://packagist.org/packages/cssjanus/cssjanus
Ref https://packagist.org/packages/wikimedia/cssjanus

Depends-On: I5345056a8af729a7b5d15d71dc6ba01b16c4cd49
Change-Id: Ibc378ff282ff710ac6ed8150ccba68a5f164557e

composer.json

@@ -22,7 +22,6 @@
 	"prefer-stable": true,
 	"require": {
 		"composer/semver": "3.4.3",
-		"cssjanus/cssjanus": "2.3.0",
 		"ext-calendar": "*",
 		"ext-ctype": "*",
 		"ext-dom": "*",
@@ -60,6 +59,7 @@
 		"wikimedia/cldr-plural-rule-parser": "2.0.0",
 		"wikimedia/common-passwords": "0.5.0",
 		"wikimedia/composer-merge-plugin": "2.1.0",
+		"wikimedia/cssjanus": "2.3.0",
 		"wikimedia/html-formatter": "4.1.0",
 		"wikimedia/ip-utils": "5.0.0",
 		"wikimedia/json-codec": "3.0.3",