title: BrowserslistError: Unknown browser major
body: <p>I'm trying to use bootstrap 4 with my angular installation. i've run
  npm install --save bootstrap@next but i have a break at runtime :</p>
  
  <pre><code>./node_modules/css-loader?{"sourceMap":false,"importLoaders":1}!./node_modules/postcss-loader/lib?{"ident":"postcss","plugins":[null,null,null],"sourceMap":false}!./node_modules/bootstrap/dist/css/bootstrap.min.css
  Module build failed: BrowserslistError: Unknown browser major
      at error (C:\xampp\htdocs\tick_master_angular\web\node_modules\browserslist\index.js:37:11)
      at Function.browserslist.checkName (C:\xampp\htdocs\tick_master_angular\web\node_modules\browserslist\index.js:320:18)
      at Function.select (C:\xampp\htdocs\tick_master_angular\web\node_modules\browserslist\index.js:438:37)
      at C:\xampp\htdocs\tick_master_angular\web\node_modules\browserslist\index.js:207:41
      at Array.forEach (native)
      at browserslist (C:\xampp\htdocs\tick_master_angular\web\node_modules\browserslist\index.js:196:13)
      at Browsers.parse (C:\xampp\htdocs\tick_master_angular\web\node_modules\autoprefixer\lib\browsers.js:44:14)
      at new Browsers (C:\xampp\htdocs\tick_master_angular\web\node_modules\autoprefixer\lib\browsers.js:39:28)
      at loadPrefixes (C:\xampp\htdocs\tick_master_angular\web\node_modules\autoprefixer\lib\autoprefixer.js:56:18)
      at plugin (C:\xampp\htdocs\tick_master_angular\web\node_modules\autoprefixer\lib\autoprefixer.js:62:18)
      at LazyResult.run (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:270:20)
      at LazyResult.asyncTick (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:185:32)
      at LazyResult.asyncTick (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:197:22)
      at processing.Promise.then._this2.processed (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:224:20)
      at LazyResult.async (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:221:27)
      at LazyResult.then (C:\xampp\htdocs\tick_master_angular\web\node_modules\postcss-loader\node_modules\postcss\lib\lazy-result.js:127:21)
   @ ./node_modules/css-loader?{"sourceMap":false,"importLoaders":1}!./node_modules/postcss-loader/lib?{"ident":"postcss","sourceMap":false}!./src/styles.css 3:10-190
   @ ./src/styles.css
   @ multi ./src/styles.css
  </code></pre>
  
  <p>Can someone help please?</p>