bump OpenAPI version number and reformat description

Author: peterstadler

api/v1/openapi.yaml

@@ -1,8 +1,14 @@
 openapi: 3.0.1
 info:
   title: WeGA API
-  description: 'The OpenAPI documentation for the RESTful interface of the Carl-Maria-von-Weber-Gesamtausgabe. <br/> (No registration, authentication, or API key is required) <br/> For feedback or requests about this API please contact stadler@weber-gesamtausgabe.de or start the discussion at https://github.com/Edirom/WeGA-WebApp'
-  version: 1.1.0
+  description: |
+    The OpenAPI documentation for the RESTful interface of the 
+    Carl-Maria-von-Weber-Gesamtausgabe. <br/> 
+    (No registration, authentication, or API key is required.) <br/> 
+    For feedback or requests about this API please contact 
+    stadler@weber-gesamtausgabe.de or start the discussion at 
+    <https://github.com/Edirom/WeGA-WebApp/issues>
+  version: 1.2.0
 servers:
   - url: 'http://localhost:8080/exist/apps/WeGA-WebApp/api/v1'
 tags: