message: Remove c3-platform from dev deps
diff: "@types/enhanced-resolve": "^3.0.4",
  "@types/mocha": "^2.2.41",
  "@types/node": "^8.0.2",
  - "c3-platform": "^1.0.0",
  "chai": "^4.0.2",
  "flat": "^4.0.0",
  "glob": "^7.1.2",
  