Bump version to 3.2-beta

Release freeze is now active, only major bug fixes will be considered.

version.py

@@ -2,7 +2,7 @@ short_name = "godot"
 name = "Godot Engine"
 major = 3
 minor = 2
-status = "alpha"
+status = "beta"
 module_config = ""
 year = 2019
 website = "https://godotengine.org"