DB: Add and migrate columns in preparation for patreon perks

Renaming nextDrop/Pull required a bit of a hack resulting in
it no longer having a default value.

models/bot.js

@@ -16,6 +16,7 @@ module.exports = (sequelize, DataTypes) => {
   Bot.init({
     maintenance: DataTypes.BOOLEAN,
     adminIDs: DataTypes.STRING,
+    patreonTierRoles: DataTypes.STRING,
     pullTimeout: DataTypes.INTEGER,
     dropTimeout: DataTypes.INTEGER
   }, {

models/user.js

@@ -103,8 +103,10 @@ module.exports = (sequelize, DataTypes) => {
     experience: DataTypes.INTEGER,
     primaryCurrency: DataTypes.INTEGER,
     secondaryCurrency: DataTypes.INTEGER,
-    nextDrop: DataTypes.DATE,
-    nextPull: DataTypes.DATE,
+    remainingDrops: DataTypes.INTEGER,
+    remainingClaims: DataTypes.INTEGER,
+    nextDropReset: DataTypes.DATE,
+    nextClaimReset: DataTypes.DATE,
     nextDaily: DataTypes.DATE
   }, {
     hooks: {