message: fix(examples): add missing dependencies
  stmux was not listed as a dependency in the babel example.
diff: "@patternplate/cli": "^2.0.0-3",
  "babel-preset-env": "^1.6.1",
  "postcss-cli": "^4.1.1",
  - "postcss-import": "^11.0.0"
  + "postcss-import": "^11.0.0",
  + "stmux": "^1.4.18"
  }
  }
  