update version computation for M.10.p

rainboard/models.py

@@ -367,9 +367,10 @@ class Project(Links, NamedModel, TimeStampedModel):
         self.update_branches(main=only_main_branches)
         self.update_tags()
         self.update_repo()
-        tag = self.tag_set.filter(name__startswith='v').last()  # TODO: implement SQL ordering for semver
-        if tag is not None:
-            self.version = tag.name[1:]
+        tags = self.tag_set.filter(name__startswith='v')  # TODO: implement SQL ordering for semver
+        if tags.exists():
+            self.version = '%i.%i.%i' % sorted(
+                tuple(int(v) for v in t.name[1:].split('.')) for t in tags if '-' not in t.name)[-1]
         robotpkg = self.robotpkg_set.order_by('-updated').first()
         branch = self.branch_set.order_by('-updated').first()
         branch_updated = branch is not None and branch.updated is not None