[chore] raster tile layer tests

Signed-off-by: Ihor Dykhta <dikhta.igor@gmail.com>

Author: igorDykhta

test/browser/layer-tests/index.js

@@ -12,6 +12,7 @@ import './hexagon-layer-specs';
 import './icon-layer-specs';
 import './line-layer-specs';
 import './point-layer-specs';
+import './raster-tile-layer-specs';
 import './scenegraph-layer-specs';
 import './trip-layer-specs';
 import './s2-geometry-layer-specs';