Merge pull request #268 from grunwaldlab/znk/release/2.9.8

bump version (pre-release of 2.9.8)

Author: zkamvar

.Rbuildignore

@@ -25,3 +25,4 @@ vignettes/poppr_manual.Rmd
 ^\.github$
 ^docs$
 ^CRAN-SUBMISSION$
+^.lintr$

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: poppr
 Type: Package
 Title: Genetic Analysis of Populations with Mixed Reproduction
-Version: 2.9.7
+Version: 2.9.8
 Authors@R: c(person(c("Zhian", "N."), "Kamvar", role = c("cre", "aut"),
     email = "zkamvar@gmail.com", comment = c(ORCID = "0000-0003-1458-7108")),
     person(c("Javier", "F."), "Tabima", role = "aut",