fix: types location (storacha#491)

`test` was added to the `tsconfig.json` at some point and the types
output started to include the `test` directory instead of just the
contents of `src`.

packages/w3ui/packages/keyring-core/package.json

@@ -8,7 +8,7 @@
     "module": "build/esm/index.js",
     "main": "build/cjs/index.js",
     "browser": "build/umd/index.production.js",
-    "types": "build/types/index.d.ts"
+    "types": "build/types/src/index.d.ts"
   },
   "scripts": {
     "compile": "../../node_modules/.bin/tsc -p tsconfig.json --noEmit --emitDeclarationOnly false",