Updated the package and add function and declared type

excel2json.d.ts

@@ -0,0 +1,12 @@
+interface Excel2JsonProps {
+  mappings?: Array<any>;
+  saveToOutput?: boolean;
+  outputPath?: string;
+  outputName?: string;
+  sheetName?: string;
+  inputFile?: string;
+  mapperFile?: string;
+  encoding?: string;
+}
+
+declare function excel2json(props: Excel2JsonProps);

package.json

@@ -1,7 +1,7 @@
 {
-  "name": "excel2json",
+  "name": "excel2json-xlsx",
   "version": "1.0.0",
-  "description": "Excel to json",
+  "description": "Excel to JSON, able to export JSON from Excel (xlsx)",
   "repository": {
     "url": "https://github.com/CUBETIQ/excel2json.git"
   },