version bump

Author: kevinushey

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: RcppParallel
 Type: Package
 Title: Parallel Programming Tools for 'Rcpp'
-Version: 4.3.17
+Version: 4.3.18
 Date: 2016-01-12
 Authors@R: c(
     person("JJ", "Allaire", role = c("aut", "cre"), email = "jj@rstudio.com"),