Update activesupport requirement from ~> 3.1.3 to >= 3.1.3, < 7.1.0

Updates the requirements on [activesupport](https://github.com/rails/rails) to permit the latest version.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v7.0.2.3/activesupport/CHANGELOG.md)
- [Commits](rails/rails@v3.1.3...v4.0.13)

---
updated-dependencies:
- dependency-name: activesupport
  dependency-type: direct:production
...

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

Gemfile.lock

@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     flix4r (0.2.4)
-      activesupport (~> 3.1.3)
+      activesupport (>= 3.1.3, < 7.1.0)
       api_cache (~> 0.2.3)
       crack (~> 0.3.1)
       i18n (~> 0.6.0)
@@ -14,21 +14,28 @@ PATH
 GEM
   remote: http://rubygems.org/
   specs:
-    activesupport (3.1.3)
-      multi_json (~> 1.0)
+    activesupport (4.0.13)
+      i18n (~> 0.6, >= 0.6.9)
+      minitest (~> 4.2)
+      multi_json (~> 1.3)
+      thread_safe (~> 0.1)
+      tzinfo (~> 0.3.37)
     api_cache (0.2.3)
-    crack (0.3.1)
-    i18n (0.6.0)
-    json (1.6.4)
+    crack (0.3.2)
+    i18n (0.6.11)
+    json (1.6.8)
     metaclass (0.0.1)
+    minitest (4.7.5)
     mocha (0.10.0)
       metaclass (~> 0.0.1)
-    multi_json (1.0.4)
-    nokogiri (1.5.0)
+    multi_json (1.15.0)
+    nokogiri (1.5.11)
     rake (12.3.3)
     ruby-hmac (0.4.0)
     ruby-openid (2.1.8)
     shoulda (2.11.3)
+    thread_safe (0.3.6)
+    tzinfo (0.3.60)
 
 PLATFORMS
   ruby

flix4r.gemspec

@@ -63,7 +63,7 @@ Gem::Specification.new do |s|
      "test/title_test.rb"
   ]
 
-  s.add_dependency 'activesupport', '~> 3.1.3'
+  s.add_dependency 'activesupport', '>= 3.1.3', '< 7.1.0'
   s.add_dependency 'i18n',          '~> 0.6.0'
   s.add_dependency 'api_cache',     '~> 0.2.3'
   s.add_dependency 'crack',         '~> 0.3.1'