Operate with i18n.load_path, not i18n.railties_load_path
Operate with i18n.load_path, not i18n.railties_load_path

After Rails update [1], `railties_load_path` supports `Rails::Paths::Path` objects only.
Using `load_path` is the common approach, which is also used by other gems [2]

[1] https://github.com/rails/rails/pull/21124
[2] https://github.com/rails/rails/blob/master/activemodel/lib/active_model.rb#L71
notonthehighstreet/will_paginate,mislav/will_paginate,ThiagoLelis/will_paginate,poporul/will_paginate,notonthehighstreet/will_paginate,CloudVLab/will_paginate,ThiagoLelis/will_paginate,betterplace/will_paginate,poporul/will_paginate,CloudVLab/will_paginate,betterplace/will_paginate,mislav/will_paginate