support to precision and scale in NUMBER types

Author: rcarubbi

lib/migrate.js

@@ -60,6 +60,15 @@ const reverseSequelizeColType = function(col, prefix = 'Sequelize.')
                 ret += ', ' + options.decimals;
             ret += ')';
         }
+
+
+        if (options.precision) {
+            ret += '('+options.precision;
+            if (options.scale)
+                ret += ', ' + options.scale;
+            ret += ')';
+        }
+
 
         ret = [ ret ];