added CITATION.cff

Author: markvanderloo

CITATION.cff

@@ -0,0 +1,25 @@
+cdd-version: 1.1.0
+message: "If you use this software, please cite is as below"
+authors:
+ - family-names: van der Loo
+ - given-names: Mark PJ
+ - orcid: https://orcid.org/0000-0002-9807-4686
+title: stringdist
+version: 0.9.7
+url: https://cran.r-project.org/package=stringdist
+references:
+ - type: article
+ authors:
+ - family-name: van der Loo
+ - given-name: Mark PJ
+ - affiliation: Statistics Netherlands
+ - orcid: https://orcid.org/0000-0002-9807-4686 
+ title: The Stringdist Package for Approximate String Matching
+ year: 2016
+ journal: The R Journal
+ volume: 6
+ issue: 1
+ pages: 1--22
+ doi: 10.32614/RJ-2014-011
+ url: https://doi.org/10.32614/RJ-2014-011
+