Missing "babylon" and other dependencies?

I am using this in a RN 0.61.5 project, and I've installed the project with:

```
npm install react-native-obfuscating-transformer --save-dev
```

When running `npx react-native start`, I get this error:

```
Loading dependency graph...Failed to construct transformer: Error: Cannot find module 'babylon'
Require stack:
-/node_modules/react-native-obfuscating-transformer/dist/getMetroTransformer.js
-/node_modules/react-native-obfuscating-transformer/dist/obfuscatingTransformer.js
-/node_modules/react-native-obfuscating-transformer/dist/index.js
-/transformer.js
-/node_modules/metro/src/JSTransformer/worker.js
-/node_modules/metro/src/DeltaBundler/Transformer/getTransformCacheKey.js
-/node_modules/metro/src/DeltaBundler/Transformer.js
-/node_modules/metro/src/Bundler.js
-/node_modules/metro/src/IncrementalBundler.js
-/node_modules/metro/src/index.js
-/node_modules/react-native/node_modules/@react-native-community/cli/build/tools/loadMetroConfig.js
-/node_modules/react-native/node_modules/@react-native-community/cli/build/commands/server/runServer.js
-/node_modules/react-native/node_modules/@react-native-community/cli/build/commands/server/server.js
-/node_modules/react-native/node_modules/@react-native-community/cli/build/commands/index.js
-/node_modules/react-native/node_modules/@react-native-community/cli/build/index.js
-/node_modules/react-native/cli.js
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:973:15)
at Function.Module._load (internal/modules/cjs/loader.js:855:27)
at Module.require (internal/modules/cjs/loader.js:1033:19)
at require (internal/modules/cjs/helpers.js:72:18)
at Object. (/node_modules/react-native-obfuscating-transformer/dist/getMetroTransformer.js:6:15)
at Module._compile (internal/modules/cjs/loader.js:1144:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1164:10)
at Module.load (internal/modules/cjs/loader.js:993:32)
at Function.Module._load (internal/modules/cjs/loader.js:892:14)
at Module.require (internal/modules/cjs/loader.js:1033:19)
```

After running `npm i babylon --save-dev`, I get:

```
Loading dependency graph...Failed to construct transformer: Error: Cannot find module 'babel-traverse'
Require stack:
- /node_modules/react-native-obfuscating-transformer/dist/getMetroTransformer.js
- /node_modules/react-native-obfuscating-transformer/dist/obfuscatingTransformer.js
- /node_modules/react-native-obfuscating-transformer/dist/index.js
- /transformer.js
- /node_modules/metro/src/JSTransformer/worker.js
- /node_modules/metro/src/DeltaBundler/Transformer/getTransformCacheKey.js
- /node_modules/metro/src/DeltaBundler/Transformer.js
- /node_modules/metro/src/Bundler.js
- /node_modules/metro/src/IncrementalBundler.js
- /node_modules/metro/src/index.js
- /node_modules/react-native/node_modules/@react-native-community/cli/build/tools/loadMetroConfig.js
- /node_modules/react-native/node_modules/@react-native-community/cli/build/commands/server/runServer.js
- /node_modules/react-native/node_modules/@react-native-community/cli/build/commands/server/server.js
- /node_modules/react-native/node_modules/@react-native-community/cli/build/commands/index.js
- /node_modules/react-native/node_modules/@react-native-community/cli/build/index.js
- /node_modules/react-native/cli.js
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:973:15)
at Function.Module._load (internal/modules/cjs/loader.js:855:27)
at Module.require (internal/modules/cjs/loader.js:1033:19)
at require (internal/modules/cjs/helpers.js:72:18)
at Object. (/node_modules/react-native-obfuscating-transformer/dist/getMetroTransformer.js:7:24)
at Module._compile (internal/modules/cjs/loader.js:1144:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1164:10)
at Module.load (internal/modules/cjs/loader.js:993:32)
at Function.Module._load (internal/modules/cjs/loader.js:892:14)
at Module.require (internal/modules/cjs/loader.js:1033:19)
```

My `transformer.js` is:

```js
const obfuscatingTransformer = require("react-native-obfuscating-transformer");

module.exports = obfuscatingTransformer({
/* options */
});
```

And my Metro Config:

```js
module.exports = {
transformer: {
babelTransformerPath: require.resolve("./transformer"),
getTransformOptions: async () => ({
transform: {
experimentalImportSupport: false,
inlineRequires: false,
},
}),
},
};
```

I see that Babylon is part of the dependencies: https://github.com/javascript-obfuscator/react-native-obfuscating-transformer/blob/master/package.json#L14 – but then again, there seem to be duplicates?

首先，将 package.json 中声明的依赖项与 dist/getMetroTransformer.js 所需的模块进行比较，并以报告中的 React Native 0.61.5 设置和 Metro 配置作为上下文。使用所示的 transformer.js 入口点重现该失败；当 transformer 启动时不再出现 babylon 或 babel-traverse 等缺少模块的错误，即表示完成。

由索引模型根据 Issue 内容生成。