message: fix(keychain): typing reference
diff: "unpkg": "dist/keychain.cjs.production.min.js",
  "gitHead": "77b4d6d531b74996e4b7a0cbd1cf5b8358a690ce",
  "author": "Hank Stoever",
  - "typings": "./dist/index.d.ts",
  + "typings": "./dist/keychain/src/index.d.ts",
  "homepage": "https://blockstack.org",
  "contributors": [
  {
  