prepare alpha release

Author: olivierdalang

travel_time_platform_plugin/metadata.txt

@@ -98,6 +98,8 @@ changelog=- 2019-02-12 : version 0.1-alpha
         - fix : improved output style for the map filter algorithm
     - 2023-09-22 : version 1.8.1
         - fix : xyz tiles not properly added on QGIS >=3.30
+    - 2023-xx-xx : version 1.9.0
+        - feature : added transporation type cycling+public_transport
 
 tags=travel,time,platform,api,distance,matrix,geocoder,geocode,geocoding,isochrone,isochrones,routing,polygon,polygons,network analysis,shortest path
 homepage=https://docs.traveltime.com/qgis/