Merge pull request #25 from anenadic/patch-1

Bumping up lesson status to beta

Author: tompollard

_config.yml

@@ -15,7 +15,7 @@ title: "Introduction to Tree Models in Python" # FIXME
 # Life cycle stage of the lesson
 # See this page for more details: https://cdh.carpentries.org/the-lesson-life-cycle.html
 # Possible values: "pre-alpha", "alpha", "beta", "stable"
-life_cycle: "pre-alpha"
+life_cycle: "beta"
 
 #------------------------------------------------------------
 # Generic settings (should not need to change).