Merge pull request #9 from graalvm/topic/jvmci-19-b03

update to jvmci-19-b03

Author: ezzarghili

.travis.yml

@@ -6,7 +6,7 @@ python:
 jdk:
   - openjdk8
 env:
-  - JVMCI_VERSION=20-b02
+  - JVMCI_VERSION=19-b03
 script:
   - env | sort
   # Only run build for a pull request or when pushing a tagged commit to master