warning: BigDecimal.new is deprecated; use BigDecimal()

[genreil]

Hi!

Would you be able to fix this deprecation warning:

.rvm/gems/ruby-2.6.6/gems/finance-2.0.0/lib/finance/cashflows.rb:25: warning: BigDecimal.new is deprecated; use BigDecimal() method instead.

Thank you!

[weshatheleopard]

@marksweston if you are no longer maintaning this, I can take over.

[monkseal]

Anybody working on this? looks like there is a PR #46