message: fix core-js typings
diff: "devDependencies": {
  "@angularclass/hmr": "^1.0.1",
  "@angularclass/hmr-loader": "^3.0.2",
  - "@types/core-js": "^0.9.0",
  "@types/jasmine": "2.5.41",
  "@types/lodash": "4.14.50",
  "@types/node": "^6.0.38",
  