Increment version number to 0.2.0

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: heumilkr
 Title: Heuristic Capacitated Vehicle Routing Problem Solver
-Version: 0.1.0.9000
+Version: 0.2.0
 Authors@R: 
     person("Lukas", "Schneiderbauer", email = "[email protected]", role = c("aut", "cre", "cph"))
 Description: Implements the Clarke-Wright algorithm to find a quasi-optimal solution to the Capacitated Vehicle Routing Problem. See Clarke, G. and Wright, J.R. (1964) <doi:10.1287/opre.12.4.568> for details. The implementation is accompanied by helper functions to inspect its solution.