Display dev version numbers on ReadTheDocs latest (#380)

docs/conf.py

@@ -71,6 +71,10 @@
 release = dask_image._version.__version__
 # The short X.Y.Z version.
 version = '.'.join(release.split('.')[:3])
+if "dev" in release:
+    display_version = "(development version)"
+else:
+    display_version = version
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -130,7 +134,7 @@
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
-html_title = f"{project} {version} documentation"
+html_title = f"{project} {display_version} documentation"
 
 # A shorter title for the navigation bar.  Default is the same as
 # html_title.