message: Add TypeScript ^3.0.0 as supported peer dependencies
  This ts-jest works fine with TypeScript 3 also, so I did change the version mask in peerDependencies to support all TypeScript 2 and 3 versions.
diff: "peerDependencies": {
  "babel-core": "^6.26.3 || ^7.0.0-0",
  "jest": "^23.0.0 || ^24.0.0",
  - "typescript": "2.x"
  + "typescript": "^2.0.0 || ^3.0.0"
  },
  "devDependencies": {
  "@types/babel-core": "latest",
  