Revert "Updating source version to 1.10.3-pre"

This reverts commit e5f10dab9f35c3f1896d8bf82b8559621e138811.
Revert "Revert "Updating source version to 1.10.3-pre""

This reverts commit f616c8e8565cb61e83ac569bda796b21753464a4.