Extend migration error handling

The current error handling seems to conflict with some sequelize
versions. So we add a second version of it in our excemptions.

I'm not happy about it, but when it helps to prevent further migration
breaking, it's worth it.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

lib/migrations/20161009040430-support-delete-note.js

@@ -2,7 +2,7 @@
 module.exports = {
   up: function (queryInterface, Sequelize) {
     return queryInterface.addColumn('Notes', 'deletedAt', Sequelize.DATE).catch(function (error) {
-      if (error.message === "ER_DUP_FIELDNAME: Duplicate column name 'deletedAt'") {
+      if (error.message === "ER_DUP_FIELDNAME: Duplicate column name 'deletedAt'" || error.message === 'column "deletedAt" of relation "Notes" already exists') {
         console.log('Migration has already run… ignoring.')
       } else {
         throw error