Use BigDecimal() instead of BigDecimal.new
Use BigDecimal() instead of BigDecimal.new

    spec/string_filter_spec.rb:175: warning: BigDecimal.new is deprecated; use Kernel.BigDecimal method instead.
    spec/string_filter_spec.rb:210: warning: BigDecimal.new is deprecated; use Kernel.BigDecimal method instead.

cypriss/mutations,lorcan/mutations