removed rspec deprecation warning about "treat_symbols_as_metadata_keys_with_true_values".
removed rspec deprecation warning about "treat_symbols_as_metadata_keys_with_true_values".

>> Deprecation Warnings:
>> RSpec::Core::Configuration#treat_symbols_as_metadata_keys_with_true_values= is deprecated, it is now set to true as default and setting it to false has no effect.

alphasights/iban-tools,Absolight/iban-tools