bump x.y.z version to even y prior to creation of RELEASE_3_21 branch

Author: jwokaty

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: SVP
 Title: Predicting cell states and their variability in single-cell or spatial omics data
-Version: 0.99.4
+Version: 1.0.0
 Authors@R: c(
   person("Shuangbin", "Xu", email = "xshuangbin@163.com", role = c("aut", "cre"), comment = c(ORCID = "0000-0003-3513-5362")),
   person("Guangchuang", "Yu", email = "guangchuangyu@gmail.com", role = c("aut", "ctb"), comment = c(ORCID = "0000-0002-6485-8781")))