Remove unnecessary >= 0 version specification
Remove unnecessary >= 0 version specification

firmanm/impressionist,charlotte-ruby/impressionist,samchen2009/impressionist,guodongme/impressionist,firmanm/impressionist,charlotte-ruby/impressionist,guodongme/impressionist,firmanm/impressionist,guodongme/impressionist,samchen2009/impressionist,samchen2009/impressionist,charlotte-ruby/impressionist