[ruby/observer] Bump up 0.1.2

https://github.com/ruby/observer/commit/6c978e6196
2023-11-07 12:42:45 +09:00 · 2023-11-07 12:42:45 +09:00 · bf33085340
--- a/lib/observer.rb
+++ b/lib/observer.rb
@ -136,7 +136,7 @@
 #   ticker.add_observer(warner, :call)
 #   ticker.run
 module Observable
-  VERSION = "0.1.1"
+  VERSION = "0.1.2"

  #
  # Add +observer+ as an observer on this object. So that it will receive