Mark Image style constructor properties `@api`
Add a testcase for parsing GML feature with only boundedBy
Merge pull request #3052 from bartvde/tests-2888

Add a testcase for parsing GML feature with only boundedBy
Merge pull request #3044 from gberaudo/api_image_style_constructor_properties

Mark Image style constructor properties `@api`
Add 'opt_' prefix to optional param
Merge pull request #3055 from fredj/coding-style

ol.tilecoord.createOrUpdate: add 'opt_' prefix to optional param
Add new ratio property to ol.layer.Vector
Use vector ratio in ol.renderer.canvas.VectorLayer
Use vector ratio in ol.renderer.dom.VectorLayer
Use vector ratio in ol.renderer.webgl.VectorLayer