Support Rails 6.0

DEPRECATION WARNING: Single arity template handlers are deprecated. Template handlers must
now accept two parameters, the view object and the source for the view object.
Change:
  >> Typescript::Rails::TemplateHandler.call(template)
To:
  >> Typescript::Rails::TemplateHandler.call(template, source)
 (called from <top (required)> at /home/coderhs/work/senitron/athena_senitron_cloud/config/application.rb:20)

Author: coderhs

lib/typescript/rails/template_handler.rb

@@ -6,8 +6,8 @@ def erb_handler
       @erb_handler ||= ActionView::Template.registered_template_handler(:erb)
     end
 
-    def call(template)
-      compiled_source = erb_handler.call(template)
+    def call(template, source)
+      compiled_source = erb_handler.call(template, source)
       path = template.identifier.gsub(/['\\]/, '\\\\\&') # "'" => "\\'", '\\' => '\\\\'
       <<-EOS
         ::Typescript::Rails::Compiler.compile('#{path}', (begin;#{compiled_source};end))