Report error in parsing version number (#1025)

Author: squadette

CHANGELOG.md

@@ -8,6 +8,9 @@ Changes since last non-beta release.
 
 *Please add entries here for your pull requests that are not yet released.*
 
+#### Fixed
+- Improved error reporting on version mismatches between Javascript and Ruby packages.
+
 ### [10.1.2] - 2018-02-27
 #### Fixed
 - Use ReactDOM.hydrate() for hydrating a SSR component if available. ReactDOM.render() has been deprecated for use on SSR components in React 16 and this addresses the warning. [PR 1028](https://github.com/shakacode/react_on_rails/pull/1028) by [theJoeBiz](https://github.com/theJoeBiz).

lib/react_on_rails/version_checker.rb

@@ -82,6 +82,9 @@ def relative_path?
       def major_minor_patch
         return if relative_path?
         match = raw.match(MAJOR_MINOR_PATCH_VERSION_REGEX)
+        unless match
+          raise "Cannot parse version number '#{raw}' (wildcard versions are not supported)"
+        end
         [match[1], match[2], match[3]]
       end