fix(utils): use webpack object version if package can't be required

fix(utils): use webpack object version if package can't be required

Author: LuudJanssen

lib/utils/is-webpack-1.js

@@ -1,6 +1,8 @@
-// eslint-disable-next-line import/no-extraneous-dependencies
-const webpackPkg = require('webpack/package.json');
+// eslint-disable-next-line import/no-extraneous-dependencies, import/no-unresolved, global-require
+const webpackPkg = require('webpack/package.json') || {};
+// eslint-disable-next-line import/no-extraneous-dependencies, import/no-unresolved, global-require
+const webpackVersion = webpackPkg.version || require('webpack').version;
 
-const webpackMajorVersion = parseInt(webpackPkg.version.split('.')[0], 10);
+const webpackMajorVersion = parseInt(webpackVersion.split('.')[0], 10);
 
 module.exports = webpackMajorVersion === 1;