Chore: 1.28.0

# [1.28.0](v1.27.0...v1.28.0) (2021-04-09)

### New

* Added a Maintenance Banner component. ([26439a8f](26439a8f))

package.json

 {
   "name": "@coscine/api-connection",
-  "version": "1.27.0",
+  "version": "1.28.0",
   "description": "This library provides methods to connect to CoScInE Apis with JavaScript.",
   "keywords": [
     "coscine",