Merge pull request #5730 from jstuder-gh/rakudo_star_2019.03

Bump Rakudo-Star version to 2019.03

library/rakudo-star

@@ -1,6 +1,6 @@
 Maintainers: Rob Hoelz <robAThoelz.ro> (@hoelzro)
 GitRepo: https://github.com/perl6/docker
 Architectures: amd64, arm64v8
-GitCommit: ce949e3551199431ef4ef721dcfaee90fb2204d8
+GitCommit: 2c1918ca12cda5aa3b63408a85f15200162f78fa
 
-Tags: latest, 2018.10
+Tags: latest, 2019.03