chore(redux-devtools): resolve warnings in examples (#546)

Author: Methuselah96

.gitignore

@@ -8,4 +8,4 @@ build
 coverage
 .idea
 .eslintcache
-!packages/redux-slider-monitor/examples/todomvc/dist/
+!packages/redux-slider-monitor/examples/todomvc/dist/index.html

packages/redux-devtools/examples/counter/webpack.config.js

@@ -2,7 +2,8 @@ var path = require('path');
 var webpack = require('webpack');
 
 module.exports = {
-  devtool: 'eval',
+  mode: process.env.NODE_ENV === 'production' ? 'production' : 'development',
+  devtool: 'eval-source-map',
   entry: [
     'webpack-dev-server/client?http://localhost:3000',
     'webpack/hot/only-dev-server',

packages/redux-devtools/examples/todomvc/components/TodoTextInput.js

@@ -47,7 +47,7 @@ export default class TodoTextInput extends Component {
         })}
         type="text"
         placeholder={this.props.placeholder}
-        autoFocus="true"
+        autoFocus={true}
         value={this.state.text}
         onBlur={::this.handleBlur}
         onChange={::this.handleChange}

packages/redux-devtools/examples/todomvc/webpack.config.js

@@ -2,7 +2,8 @@ var path = require('path');
 var webpack = require('webpack');
 
 module.exports = {
-  devtool: 'eval',
+  mode: process.env.NODE_ENV === 'production' ? 'production' : 'development',
+  devtool: 'eval-source-map',
   entry: [
     'webpack-dev-server/client?http://localhost:3000',
     'webpack/hot/only-dev-server',