Update ruby-openid requirement from ~> 2.1.8 to >= 2.1.8, < 2.10.0

Updates the requirements on [ruby-openid](https://github.com/openid/ruby-openid) to permit the latest version.
- [Release notes](https://github.com/openid/ruby-openid/releases)
- [Changelog](https://github.com/openid/ruby-openid/blob/master/CHANGELOG.md)
- [Commits](https://github.com/openid/ruby-openid/commits/v2.9.2)

---
updated-dependencies:
- dependency-name: ruby-openid
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -9,7 +9,7 @@ PATH
       json (~> 1.6.3)
       nokogiri (>= 1.5, < 1.14)
       ruby-hmac (~> 0.4.0)
-      ruby-openid (~> 2.1.8)
+      ruby-openid (>= 2.1.8, < 2.10.0)
 
 GEM
   remote: http://rubygems.org/
@@ -31,7 +31,7 @@ GEM
     racc (1.6.0)
     rake (12.3.3)
     ruby-hmac (0.4.0)
-    ruby-openid (2.1.8)
+    ruby-openid (2.9.2)
     shoulda (2.11.3)
 
 PLATFORMS

flix4r.gemspec

@@ -70,7 +70,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'json',          '~> 1.6.3'
   s.add_dependency 'nokogiri',      '>= 1.5', '< 1.14'
   s.add_dependency 'ruby-hmac',     '~> 0.4.0'
-  s.add_dependency 'ruby-openid',   '~> 2.1.8'
+  s.add_dependency 'ruby-openid',   '>= 2.1.8', '< 2.10.0'
   s.add_development_dependency 'mocha'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'shoulda'