Fix uninitialized constant HamlLint::Linter

Running multiple `rake` commands with `spring', such as
`spring rake db:rollback` could cause a
`NameError: uninitialized constant HamlLint::Linter`

lib/haml_lint/inline_javascript.rb

@@ -2,9 +2,9 @@
 # frozen_string_literal: true
 
 unless Rails.env.production?
-  require 'haml_lint/haml_visitor'
-  require 'haml_lint/linter'
-  require 'haml_lint/linter_registry'
+  require_dependency 'haml_lint/haml_visitor'
+  require_dependency 'haml_lint/linter'
+  require_dependency 'haml_lint/linter_registry'
 
   module HamlLint
     class Linter::InlineJavaScript < Linter