get version of doc from version.txt

Author: Remi-Gau

docs/source/conf.py

@@ -23,7 +23,8 @@
 author = "the CPP ROI dev team"
 
 # The full version, including alpha/beta/rc tags
-release = "v0.2.0dev"
+with open('../../version.txt', encoding='utf-8') as version_file:
+    release = version_file.read()
 
 
 # -- General configuration ---------------------------------------------------