Enhance exported types

Author: openscript

src/index.tsx

@@ -10,6 +10,7 @@ export function DSVImport<T extends { [key: string]: string }>(props: PropsWithC
 DSVImport.TextareaInput = TextareaInput;
 DSVImport.TablePreview = TablePreview;
 
-export { ColumnsType } from './models/column';
+export { ColumnType, ColumnsType } from './models/column';
 export { useDSVImport } from './features/context';
 export { Rule } from './models/rule';
+export { Transformer } from './models/transformer';

src/models/column.ts

@@ -1,4 +1,5 @@
 import { Rule } from './rule';
 import { Transformer } from './transformer';
 
-export type ColumnsType<T> = { key: keyof T; label: string; rules?: Rule[]; transformers?: Transformer[] }[];
+export type ColumnType<T> = { key: keyof T; label: string; rules?: Rule[]; transformers?: Transformer[] };
+export type ColumnsType<T> = ColumnType<T>[];