message: chore(package): change peerDependencies to be more leniant
diff: "zone.js": "^0.7.4"
  },
  "peerDependencies": {
  - "@angular/core": "^2.0.0",
  + "@angular/core": ">=2.0.0",
  "@types/chartist": "^0.9.34",
  - "chartist": "^0.9.8"
  + "chartist": ">=0.9.8"
  }
  }
  