release v0.11.0-rc.1

- upgrade to OpenLayers v5  (#66)
- drop out support of OpenLayers v4 (for v4 there is v0.10.x branch)
- change distribution package structure [BREAKING]
  Now the VueLayers provide only ES build for production/development environment and UMD build for
  a quick usage, so compiled ES source code should be imported simply from `/lib` directory (`/lib/_esm` was before).
- fix jerking vl-overlay (#80)
- vl-source-vector: handle `changefeature` event
- Update links in documentation (#88)

package.json

@@ -1,7 +1,7 @@
 {
   "name": "vuelayers",
   "fullname": "VueLayers",
-  "version": "0.11.0-beta.3",
+  "version": "0.11.0-rc.1",
   "description": "Web map Vue components with the power of OpenLayers",
   "author": "Vladimir Vershinin <ghettovoice@gmail.com>",
   "main": "./lib/index.js",