move to CoreDSL v2.0.3

com.minres.coredsl.json/META-INF/MANIFEST.MF

@@ -12,6 +12,7 @@ Require-Bundle: com.minres.coredsl;bundle-version="2.0.0",
  org.eclipse.equinox.preferences;bundle-version="3.8.0",
  org.eclipse.xtend.lib;bundle-version="2.14.0",
  org.eclipse.xtext;bundle-version="2.22.0",
+ org.eclipse.emf.mwe.utils;bundle-version="1.6.2",
  org.apache.commons.logging;bundle-version="1.2.0",
  org.json;bundle-version="1.0.0"
 Bundle-RequiredExecutionEnvironment: JavaSE-11