Version: bump to v5.3.0-dev

We have v5.2 branch now.

Signed-off-by: Lokesh Mandvekar <lsm5@fedoraproject.org>

contrib/cirrus/setup_environment.sh

@@ -446,7 +446,7 @@ case "$TEST_FLAVOR" in
         # machine-os image changes too frequently, can't be precached
         # FIXME: I don't think we can use version.go, because of chicken-egg
         # problem when that gets bumped. Ideas welcome.
-        $LCR cache podman/machine-os:5.2
+        $LCR cache podman/machine-os:5.3
         install_test_configs
         ;;
     swagger)

version/rawversion/version.go

@@ -7,4 +7,4 @@ package rawversion
 //
 // NOTE: remember to bump the version at the top of the top-level README.md
 // file when this is bumped.
-const RawVersion = "5.2.0-dev"
+const RawVersion = "5.3.0-dev"