pw_web: Export TypeScript type definitions from package.json

Change-Id: I8c6accefb6d0a2f5c3422c92fef6e1f491eb8589
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/105480
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Asad Memon <asadmemon@google.com>
Reviewed-by: Anthony DiGirolamo <tonymd@google.com>

package.json

@@ -1,9 +1,10 @@
 {
  "name": "pigweedjs",
- "version": "0.0.4",
+ "version": "0.0.5",
  "description": "An open source collection of embedded-targeted libraries",
  "author": "The Pigweed Authors",
  "license": "Apache-2.0",
+ "types": "./dist/index.d.ts",
  "exports": {
  ".": "./dist/index.mjs",
  "./protos": "./dist/protos/collection.umd.js",