Backport making railties a development dependency

Author: cheerfulstoic

lib/neo4j/version.rb

@@ -1,3 +1,3 @@
 module Neo4j
-  VERSION = '4.1.4'
+  VERSION = '4.1.5'
 end

neo4j.gemspec

@@ -29,10 +29,10 @@ A Neo4j OGM (Object-Graph-Mapper) for use in Ruby on Rails and Rack frameworks h
   s.add_dependency('orm_adapter', '~> 0.5.0')
   s.add_dependency('activemodel', '~> 4')
   s.add_dependency('activesupport', '~> 4')
-  s.add_dependency('railties', '~> 4')
   s.add_dependency('active_attr', '~> 0.8')
   s.add_dependency('neo4j-core', '~> 4.0.0')
   s.add_dependency('neo4j-community', '~> 2.0') if RUBY_PLATFORM =~ /java/
+  s.add_development_dependency('railties', '~> 4')
   s.add_development_dependency('pry')
   s.add_development_dependency('os')
   s.add_development_dependency('rake')