fixing title_to_doi adding stringr

Science-for-Nature-and-People / BibScan

R package to batch download PDFs from a Web of Science search

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Closed brunj7 closed 6 years ago

brunj7 commented 6 years ago

fixing the error ( #18 ) within title_to_doi due to the missing namespace for str_trim

Also added stringr as dependency in the DESCRIPTION file

And some small other syntax changes