Use github-no-api for assets plugin. (#13100)

Possible fix for #12987. At least for me it fixes travis tests on my fork: https://travis-ci.org/rob006/yii2-dev/branches.

References:

    http://www.yiiframework.com/wiki/843/boost-composer-asset-plugin-update-speed/
    fxpio/composer-asset-plugin#226

composer.json

@@ -99,6 +99,10 @@
         "asset-installer-paths": {
             "npm-asset-library": "vendor/npm",
             "bower-asset-library": "vendor/bower"
-        }
+        },
+        "asset-vcs-driver-options": {
+            "github-no-api": true
+        },
+        "asset-pattern-skip-version": "(-build|-patch)"
     }
 }