Release v1.5.0

Author: fmaussion

docs/whats-new.rst

@@ -4,8 +4,13 @@
 Version history
 ===============
 
-v1.5.0 (unreleased)
--------------------
+v1.5.0
+------
+
+This a new update of the OGGM model. It should be largely compatible with
+OGGM v1.4.0. **The main addition in this release is the computation of
+hydrological diagnostics.** Check-out the new tutorial at
+https://oggm.org/tutorials !
 
 Breaking changes
 ~~~~~~~~~~~~~~~~