feat: add types to package json (#19)

Author: maxday

.changeset/nice-walls-happen.md

@@ -0,0 +1,5 @@
+---
+"@aws/lambda-invoke-store": patch
+---
+
+include types declarations

package.json

@@ -4,6 +4,7 @@
   "description": "Invoke scoped data storage for AWS Lambda Node.js Runtime Environment",
   "homepage": "https://github.com/awslabs/aws-lambda-invoke-store",
   "main": "./dist-cjs/invoke-store.js",
+  "types": "./dist-types/invoke-store.d.ts",
   "module": "./dist-es/invoke-store.js",
   "exports": {
     ".": {