Skip versions that are partial semvers (0.1) and the ones that don't …

…have proper elm-package.json persent.

Fixes: #37

lib/elm_install/identifier.rb

@@ -133,23 +133,20 @@ def json(directory)
       path = File.join(directory, 'elm-package.json')
       JSON.parse(File.read(path))
     rescue JSON::ParserError
-      exit "Invalid JSON in file: #{path.bold}"
-      {}
+      warn "Invalid JSON in file: #{path.bold}"
     rescue Errno::ENOENT
-      exit "Could not find file: #{path.bold}"
-      {}
+      warn "Could not find file: #{path.bold}"
     end
 
-    Contract String => NilClass
+    Contract String => Hash
     # Exits the current process and logs a given message.
     #
     # @param message [String] The message
     #
-    # @return nil
-    def exit(message)
-      Logger.arrow message
-      Process.abort
-      nil
+    # @return [Hash] An empty hash
+    def warn(message)
+      Logger.arrow message if @options[:vebose]
+      {}
     end
   end
 end

lib/elm_install/repository.rb

@@ -54,6 +54,7 @@ def versions
       repo
         .tags
         .map(&:name)
+        .select { |tag| tag =~ /(.*\..*\..*)/ }
         .map { |tag| Semverse::Version.try_new tag }
         .compact
     end