message: move styled-components to deps instead of dev-deps
diff: "primer-typography": "1.0.1",
  "react": "16.4.2",
  "react-dom": "16.4.2",
  + "styled-components": "4.1.2",
  "styled-system": "3.1.3",
  "system-components": "3.0.1"
  },
  "rollup-plugin-babel": "4.0.0-beta.8",
  "rollup-plugin-commonjs": "9.1.3",
  "sass.macro": "0.1.0",
  - "styled-components": "4.1.2"
  }
  }
  