python: increase version to 1.4.2.1
python: increase version to 1.4.2.1

j-coll/opencga,opencb/opencga,j-coll/opencga,j-coll/opencga,j-coll/opencga,j-coll/opencga,opencb/opencga,opencb/opencga,opencb/opencga,opencb/opencga,opencb/opencga,j-coll/opencga