[eslint config] [*] [docs] add note about install-peerdeps

Closes airbnb#1233.

Author: nathanhleung

packages/eslint-config-airbnb-base/README.md

@@ -32,6 +32,19 @@ Our default export contains all of our ESLint rules, including ECMAScript 6+. It
     npm install --save-dev eslint-config-airbnb-base eslint@^#.#.# eslint-plugin-import@^#.#.#
   ```
 
+  Windows users can either install all the peer dependencies manually, or use the [install-peerdeps](https://github.com/nathanhleung/install-peerdeps) cli tool.
+
+  ```sh
+  npm install -g install-peerdeps
+  install-peerdeps --dev eslint-config-airbnb-base
+  ```
+
+  The cli will produce and run a command like:
+
+  ```sh
+  npm install --save-dev eslint-config-airbnb-base eslint@^#.#.# eslint-plugin-import@^#.#.#
+  ```
+
 2. Add `"extends": "airbnb-base"` to your .eslintrc
 
 ### eslint-config-airbnb-base/legacy

packages/eslint-config-airbnb/README.md

@@ -33,6 +33,19 @@ Our default export contains all of our ESLint rules, including ECMAScript 6+ and
   npm install --save-dev eslint-config-airbnb eslint@^#.#.# eslint-plugin-jsx-a11y@^#.#.# eslint-plugin-import@^#.#.# eslint-plugin-react@^#.#.#
   ```
 
+  Windows users can either install all the peer dependencies manually, or use the [install-peerdeps](https://github.com/nathanhleung/install-peerdeps) cli tool.
+
+  ```sh
+  npm install -g install-peerdeps
+  install-peerdeps --dev eslint-config-airbnb
+  ```
+
+  The cli will produce and run a command like:
+
+  ```sh
+  npm install --save-dev eslint-config-airbnb eslint@^#.#.# eslint-plugin-jsx-a11y@^#.#.# eslint-plugin-import@^#.#.# eslint-plugin-react@^#.#.#
+  ```
+
 2. Add `"extends": "airbnb"` to your .eslintrc
 
 ### eslint-config-airbnb/base