bump ActiveSupport dependency
bump ActiveSupport dependency

Change-Id: I9b200ffd6062da418d13dcef83bd4e7b4778981a
Reviewed-on: https://gerrit.instructure.com/114711
Tested-by: Jenkins
Reviewed-by: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
Product-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
QA-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
Product-Review: Dan Dorman <ff48ef1a9d9af96b58525cc7514a40042635675a@instructure.com>
QA-Review: Dan Dorman <ff48ef1a9d9af96b58525cc7514a40042635675a@instructure.com>

instructure/ruby-saml2,instructure/ruby-saml2