bump x.y.z version to even y prior to creation of RELEASE_3_22 branch

Author: jwokaty

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: Rbowtie
 Type: Package
 Title: R bowtie wrapper
-Version: 1.49.0
+Version: 1.50.0
 Date: 2023-01-29
 Authors@R: c(person("Florian", "Hahne", role = c("aut")),
              person("Anita", "Lerch", role = c("aut")),