Export ColumnHeader type (#72)

* Export ColumnHeader

* Bump version

Author: alexcaza

lib/index.ts

@@ -1,4 +1,4 @@
 export * from "./generator";
 export { mkConfig } from "./config";
-export { CsvOutput, ConfigOptions } from "./types";
+export { CsvOutput, ConfigOptions, ColumnHeader } from "./types";
 export { asString } from "./helpers";

package.json

@@ -1,6 +1,6 @@
 {
   "name": "export-to-csv",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "description": "Easily create CSV data from json collection",
   "type": "module",
   "repository": {