download your fork
make the changes
do a git add for the changed files
and then a git commit -m “…whatever message to describe the changes”
then a git push to update the github copy of your fork

then create a pull request of your changes back to the original.

this way, you have updated the code and the author can accept your pull request and update the master without having to write the code himself…

welcome to open source community development

currencyAPI: "https://api.apilayer.com/fixer/latest",

A small tweak in the line 458 to :

params = "?apikey=" + this.config.currencyAPIKey;

Could you please check and if possible provide an update? Thanks for your contribution, it is a beautiful and helpful module. Best!