Also bump up gemspec

Author: hsbt

rubygems-update.gemspec

@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |s|
   s.name = "rubygems-update"
-  s.version = "3.1.1"
+  s.version = "3.1.2"
   s.authors = ["Jim Weirich", "Chad Fowler", "Eric Hodel", "Luis Lavena", "Aaron Patterson", "Samuel Giddins", "André Arko", "Evan Phoenix", "Hiroshi SHIBATA"]
   s.email = ["", "", "[email protected]", "[email protected]", "[email protected]", "[email protected]", "[email protected]", "[email protected]", "[email protected]"]