Issue #3002206 by jibran, longwave, truls1502, alexpott, NickWilde: Update the stable version of drupal/coder to ˆ8.3.1

SA-CORE-2019-003 by samuel.mortenson, Berdir, pwolanin, dawehner, cashwilliams, Wim Leers, xjm, larowlan, alexpott, plach, damiankloip, tstoeckler, tedbow, DamienMcKenna, effulgentsia, RobLoach, gabesullice, drumm, heshanlk, dsnopek, fago, miro_dietiker, truls1502