Add patch to relax rails

debian/patches/0470-relax-rails.patch

@@ -0,0 +1,11 @@
+--- a/Gemfile
++++ b/Gemfile
+@@ -5,7 +5,7 @@
+ 
+ gem_versions = {}
+ gem_versions['activerecord_sane_schema_dumper'] = rails5? ? '1.0'    : '0.2'
+-gem_versions['rails']                           = rails5? ? '5.0.7'  : '4.2.11'
++gem_versions['rails']                           = rails5? ? '~> 5.0'  : '4.2.11'
+ gem_versions['rails-i18n']                      = rails5? ? '~> 5.1' : '~> 4.0.9'
+ 
+ # The 2.0.6 version of rack requires monkeypatch to be present in

debian/patches/series

@@ -12,6 +12,7 @@
 0440-remove-puma.patch
 0450-remove-bullet.patch
 0460-relax-rspec-rails.patch
+0470-relax-rails.patch
 0500-set-webpack-root.patch
 0510-remove-dev-dependencies.patch
 0520-add-system-lib-path-for-webpack.patch