update babel part in transforms (#194)

* update babel part in transforms

* fix typo

* improve sentences slightly

* remove redundant text

src/i18n/en/docs/recipes.md

@@ -37,7 +37,6 @@ First we need to install the dependencies for Preact.
 npm install --save preact
 npm install --save preact-compat
 npm install --save-dev parcel-bundler
-npm install --save-dev babel-preset-env
 npm install --save-dev babel-preset-preact
 ```
 
@@ -47,7 +46,6 @@ npm install --save-dev babel-preset-preact
 yarn add preact
 yarn add preact-compat
 yarn add --dev parcel-bundler
-yarn add --dev babel-preset-env
 yarn add --dev babel-preset-preact
 ```
 
@@ -56,7 +54,9 @@ Then make sure the following Babel config is present.
 ```javascript
 // .babelrc
 {
-  "presets": ["env", "preact"]
+  "presets": [
+    "preact"
+  ]
 }
 ```
 

src/i18n/en/docs/transforms.md

@@ -11,17 +11,29 @@ This even works in third-party `node_modules`: if a configuration file is publis
 Install presets and plugins in your app:
 
 ```bash
-yarn add babel-preset-env
+yarn add babel-preset-react
 ```
 
 Then, create a `.babelrc`:
 
 ```json
 {
-  "presets": ["env"]
+  "presets": [
+    "react"
+  ]
 }
 ```
 
+### Default babel transforms
+
+Parcel transpiles your code with `babel-preset-env` by default, this is to transpile every module both internal (local requires) and external (node_modules) to match the defined target.
+
+For the `browser` target it utilises [browserlist](https://github.com/browserslist/browserslist), the target browserlist can be defined in `package.json` (`engines.browsers` or `browserslist`) or using a configuration file (`browserslist` or `.browserslistrc`).
+
+The browserlist target defaults to: `> 0.25%` (Meaning, support every browser that has 0.25% or more of the total amount of active web users)
+
+For the `node` target, Parcel uses the `engines.node` defined in `package.json`, this default to *node 8*.
+
 ## PostCSS
 
 [PostCSS](http://postcss.org) is a tool for transforming CSS with plugins, like [autoprefixer](https://github.com/postcss/autoprefixer), [cssnext](http://cssnext.io/), and [CSS Modules](https://github.com/css-modules/css-modules). You can configure PostCSS with Parcel by creating a configuration file using one of these names: `.postcssrc` (JSON), `.postcssrc.js`, or `postcss.config.js`.