update .Rbuildignore for ,editorconfig [ci skip]

Author: eddelbuettel

.Rbuildignore

@@ -8,13 +8,14 @@ vignettes/jss.bst
 ^\.Rproj\.user$
 vignettes/notyet
 doxyfile
-.travis.yml
-.dir-locals.el
-.clang_format
+\.travis\.yml
+\.dir-locals\.el
+\.clang_format
 vignettes/getCurrentVersionsOfCitedPackages.R
 ^Contributing.md$
 ^\.codecov\.yml$
 inst/include/Rcpp.h.new
 inst/include/Rcpp.h.old
 LICENSE
-.*.tar.gz
+.*.tar.gz
+\.editorconfig