fix: types mapping

- "*" match seems to cause multiple path substitutions
microsoft/TypeScript#41284 that packge name prefix seems to resolve
- add types field which acts as main in TS

Author: Gozala

package.json

@@ -3,6 +3,7 @@
   "version": "0.0.0-dev",
   "description": "Interface for multihash, multicodec, multibase and CID",
   "main": "./src/index.js",
+  "types": "./types/index.d.ts",
   "type": "module",
   "scripts": {
     "build": "npm run build:js && npm run build:types",
@@ -118,11 +119,8 @@
   "homepage": "https://github.com/multiformats/js-multiformats#readme",
   "typesVersions": {
     "*": {
-      "*": [
+      "multiformats/*": [
         "types/*"
-      ],
-      "cjs/src/index.js": [
-        "types/index.d.ts"
       ]
     }
   }