add some packages

node_modules/babel-plugin-minify-simplify/README.md

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+# babel-plugin-minify-simplify
+
+> Simplifies code for minification by reducing statements into expressions and making expressions uniform where possible.
+
+## Example
+
+### Reduce statement into expression
+
+**In**
+
+```js
+function foo() {
+  if (x) a();
+}
+function foo2() {
+  if (x) a();
+  else b();
+}
+```
+
+**Out**
+
+```js
+function foo() {
+  x && a();
+}
+function foo2() {
+  x ? a() : b();
+}
+```
+
+### Make expression as uniform as possible for better compressibility
+
+**In**
+
+```js
+undefined
+foo['bar']
+Number(foo)
+```
+
+**Out**
+
+```js
+void 0
+foo.bar
++foo
+```
+
+
+## Installation
+
+```sh
+npm install babel-plugin-minify-simplify
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "plugins": ["minify-simplify"]
+}
+```
+
+### Via CLI
+
+```sh
+babel --plugins minify-simplify script.js
+```
+
+### Via Node API
+
+```javascript
+require("@babel/core").transform("code", {
+  plugins: ["minify-simplify"]
+});
+```