message: Fixed TS definitions
diff: -// Type definitions for react-querybuilder 2.1.0
  +// Type definitions for react-querybuilder 2.2.1
  // Project: https://github.com/sapientglobalmarkets/react-querybuilder/
  // Definitions by: Jake Boone <https://github.com/jakeboone02>
  @@ -36,7 +36,7 @@ interface CommonCustomControlProps {
  /**
  * The title for this control
  */
  - title: string;
  + title?: string;
  }
  interface ActionCustomControlProps extends CommonCustomControlProps {
  @@ -251,8 +251,8 @@ export default class QueryBuilder extends React.Component<QueryBuilderProps> {}
  * based on a given field, operator, and value. By default, values are
  * processed assuming the default operators are being used.
  */
  -export const formatQuery = (
  +export function formatQuery(
  ruleGroup: RuleGroup,
  format: 'json' | 'sql',
  valueProcessor?: (field: string, operator: string, value: any) => string
  -) => string;
  +): string;
  