fix(model): prevent version number from being incremented as string (#10217)

lib/model.js

@@ -3731,7 +3731,7 @@ class Model {
         where = this.where(true);
         where = this.where(true);
         where = Utils.mapValueFieldNames(where, Object.keys(where), this.constructor);
         where = Utils.mapValueFieldNames(where, Object.keys(where), this.constructor);
         if (versionAttr) {
         if (versionAttr) {
-          values[versionFieldName] += 1;
+          values[versionFieldName] = parseInt(values[versionFieldName], 10) + 1;
         }
         }
         query = 'update';
         query = 'update';
         args = [this, this.constructor.getTableName(options), values, where, options];
         args = [this, this.constructor.getTableName(options), values, where, options];