Update version_checker.rb

CHANGELOG.md

@@ -5,6 +5,9 @@ Contributors: please follow the recommendations outlined at [keepachangelog.com]
 
 ## [Unreleased]
 
+### Changed
+- Update version_checker.rb to `logger.error` rather than `logger.warn` for gem/npm version mismatch. [#788](https://github.com/shakacode/react_on_rails/issues/788) by [justin808](https://github.com/justin808).
+
 ### Fixed
 - Clear hydrated stores with each server rendered block. [#785](https://github.com/shakacode/react_on_rails/pull/785) by [udovenko](https://github.com/udovenko)
 

lib/react_on_rails/version_checker.rb

@@ -31,7 +31,7 @@ def log_differing_versions_warning
             "            node package: #{node_package_version.raw}\n" \
             "Ensure the installed MAJOR version of the gem is the same as the MAJOR version of \n"\
             "your installed node package."
-      logger.warn(msg)
+      logger.error(msg)
     end
 
     def gem_version

spec/react_on_rails/version_checker_spec.rb

@@ -4,7 +4,7 @@
 class FakeLogger
   attr_accessor :message
 
-  def warn(message)
+  def error(message)
     self.message = message
   end
 end