add some packages

node_modules/babel-plugin-transform-merge-sibling-variables/README.md

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+# babel-plugin-transform-merge-sibling-variables
+
+Merge sibling variables into one.
+
+## Example
+
+**In**
+
+```javascript
+// merge into a single VariableDeclaration
+var foo = "bar";
+var bar = "foo";
+foobar();
+
+// merge into the next for loop
+var i = 0;
+for (var x = 0; x < 10; x++) {}
+```
+
+**Out**
+
+```javascript
+var foo = "bar",
+    bar = "foo";
+foobar();
+
+for (var i = 0, x = 0; x < 10; x++) {}
+```
+
+## Installation
+
+```sh
+npm install babel-plugin-transform-merge-sibling-variables
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "plugins": ["transform-merge-sibling-variables"]
+}
+```
+
+### Via CLI
+
+```sh
+babel --plugins transform-merge-sibling-variables script.js
+```
+
+### Via Node API
+
+```javascript
+require("@babel/core").transform("code", {
+  plugins: ["transform-merge-sibling-variables"]
+});
+```