fix(package): include .d.ts files to the distributed package

Author: toverux

package.json

@@ -84,7 +84,7 @@
     ]
   },
   "scripts": {
-    "build": "npm run build-lib && npm run build-mjs && npm run build-es && npm run build-node8",
+    "build": "npm run build-lib && npm run build-mjs && npm run build-es && npm run build-node8 && npm run build-ts",
     "build-lib": "rimraf lib && BABEL_ENV=cjs babel src --ignore __tests__,__mocks__ -d lib && COPY_TO_FOLDER=lib npm run build-flow",
     "build-es": "rimraf es && BABEL_ENV=es babel src --ignore __tests__,__mocks__ -d es && COPY_TO_FOLDER=es npm run build-flow",
     "build-node8": "rimraf node8 && BABEL_ENV=node8 babel src --ignore __tests__,__mocks__ -d node8 && COPY_TO_FOLDER=node8 npm run build-flow",