build errors

WARNING in (webpack)/~/enhanced-resolve/~/graceful-fs/fs.js
Critical dependencies:
11:12-19 require function is used in a way in which dependencies cannot be statically extracted
 @ (webpack)/~/enhanced-resolve/~/graceful-fs/fs.js 11:12-19

WARNING in (webpack)/~/enhanced-resolve/~/graceful-fs/LICENSE
Module parse failed: C:\dev\projects\titler\node_modules\webpack\node_modules\enhanced-resolve\node_modules\graceful-fs\LICENSE Line 1: Unexpected identifier
You may need an appropriate loader to handle this file type.
| The ISC License
|
| Copyright (c) Isaac Z. Schlueter and Contributors
 @ (webpack)/~/enhanced-resolve/~/graceful-fs ^\.\/.*$

WARNING in (webpack)/~/enhanced-resolve/~/graceful-fs/README.md
Module parse failed: C:\dev\projects\titler\node_modules\webpack\node_modules\enhanced-resolve\node_modules\graceful-fs\README.md Line 1: Unexpected token ILLEGAL
You may need an appropriate loader to handle this file type.
| # graceful-fs
|
| graceful-fs functions as a drop-in replacement for the fs module,
 @ (webpack)/~/enhanced-resolve/~/graceful-fs ^\.\/.*$

WARNING in (webpack)/~/watchpack/~/chokidar/lib/fsevents-handler.js
Module not found: Error: Cannot resolve module 'fsevents' in C:\dev\projects\titler\node_modules\webpack\node_modules\watchpack\node_modules\chokidar\lib
 @ (webpack)/~/watchpack/~/chokidar/lib/fsevents-handler.js 7:17-36

WARNING in (webpack)/~/watchpack/~/graceful-fs/fs.js
Critical dependencies:
11:12-19 require function is used in a way in which dependencies cannot be statically extracted
 @ (webpack)/~/watchpack/~/graceful-fs/fs.js 11:12-19

WARNING in (webpack)/~/watchpack/~/graceful-fs/LICENSE
Module parse failed: C:\dev\projects\titler\node_modules\webpack\node_modules\watchpack\node_modules\graceful-fs\LICENSE Line 1: Unexpected identifier
You may need an appropriate loader to handle this file type.
| The ISC License
|
| Copyright (c) Isaac Z. Schlueter and Contributors
 @ (webpack)/~/watchpack/~/graceful-fs ^\.\/.*$

WARNING in (webpack)/~/watchpack/~/graceful-fs/README.md
Module parse failed: C:\dev\projects\titler\node_modules\webpack\node_modules\watchpack\node_modules\graceful-fs\README.md Line 1: Unexpected token ILLEGAL
You may need an appropriate loader to handle this file type.
| # graceful-fs
|
| graceful-fs functions as a drop-in replacement for the fs module,
 @ (webpack)/~/watchpack/~/graceful-fs ^\.\/.*$

WARNING in (webpack)/~/watchpack/~/chokidar/~/anymatch/~/micromatch/~/braces/index.js
Critical dependencies:
14:33-40 require function is used in a way in which dependencies cannot be statically extracted
 @ (webpack)/~/watchpack/~/chokidar/~/anymatch/~/micromatch/~/braces/index.js 14:33-40

WARNING in (webpack)/~/watchpack/~/chokidar/~/anymatch/~/micromatch/~/braces/LICENSE
Module parse failed: C:\dev\projects\titler\node_modules\webpack\node_modules\watchpack\node_modules\chokidar\node_modules\anymatch\node_modules\micromatch\node_modules\braces\LICENSE Line 1: Unexpected identifier
You may need an appropriate loader to handle this file type.
| The MIT License (MIT)
|
| Copyright (c) 2014-2015, Jon Schlinkert.
 @ (webpack)/~/watchpack/~/chokidar/~/anymatch/~/micromatch/~/braces ^\.\/.*$

WARNING in (webpack)/~/watchpack/~/chokidar/~/anymatch/~/micromatch/~/braces/README.md
Module parse failed: C:\dev\projects\titler\node_modules\webpack\node_modules\watchpack\node_modules\chokidar\node_modules\anymatch\node_modules\micromatch\node_modules\braces\README.md Line 1: Unexpected token ILLEGAL
You may need an appropriate loader to handle this file type.
| # braces [![NPM version](https://badge.fury.io/js/braces.svg)](http://badge.fury.io/js/braces)
|
| > Fastest brace expansion for node.js, with the most complete support for the Bash 4.3 braces specification.
 @ (webpack)/~/watchpack/~/chokidar/~/anymatch/~/micromatch/~/braces ^\.\/.*$

ERROR in (webpack)/~/enhanced-resolve/~/graceful-fs/test/open.js
Module not found: Error: Cannot resolve module 'tap' in C:\dev\projects\titler\node_modules\webpack\node_modules\enhanced-resolve\node_modules\graceful-fs\test
 @ (webpack)/~/enhanced-resolve/~/graceful-fs/test/open.js 1:11-25

ERROR in (webpack)/~/enhanced-resolve/~/graceful-fs/test/max-open.js
Module not found: Error: Cannot resolve module 'tap' in C:\dev\projects\titler\node_modules\webpack\node_modules\enhanced-resolve\node_modules\graceful-fs\test
 @ (webpack)/~/enhanced-resolve/~/graceful-fs/test/max-open.js 1:11-25

ERROR in (webpack)/~/enhanced-resolve/~/graceful-fs/test/write-then-read.js
Module not found: Error: Cannot resolve module 'tap' in C:\dev\projects\titler\node_modules\webpack\node_modules\enhanced-resolve\node_modules\graceful-fs\test
 @ (webpack)/~/enhanced-resolve/~/graceful-fs/test/write-then-read.js 4:11-25

ERROR in (webpack)/~/enhanced-resolve/~/graceful-fs/test/readdir-sort.js
Module not found: Error: Cannot resolve module 'tap' in C:\dev\projects\titler\node_modules\webpack\node_modules\enhanced-resolve\node_modules\graceful-fs\test
 @ (webpack)/~/enhanced-resolve/~/graceful-fs/test/readdir-sort.js 1:11-25

ERROR in (webpack)/~/watchpack/~/graceful-fs/test/max-open.js
Module not found: Error: Cannot resolve module 'tap' in C:\dev\projects\titler\node_modules\webpack\node_modules\watchpack\node_modules\graceful-fs\test
 @ (webpack)/~/watchpack/~/graceful-fs/test/max-open.js 1:11-25

ERROR in (webpack)/~/watchpack/~/graceful-fs/test/readdir-sort.js
Module not found: Error: Cannot resolve module 'tap' in C:\dev\projects\titler\node_modules\webpack\node_modules\watchpack\node_modules\graceful-fs\test
 @ (webpack)/~/watchpack/~/graceful-fs/test/readdir-sort.js 1:11-25

ERROR in (webpack)/~/watchpack/~/graceful-fs/test/write-then-read.js
Module not found: Error: Cannot resolve module 'tap' in C:\dev\projects\titler\node_modules\webpack\node_modules\watchpack\node_modules\graceful-fs\test
 @ (webpack)/~/watchpack/~/graceful-fs/test/write-then-read.js 4:11-25

ERROR in (webpack)/~/watchpack/~/graceful-fs/test/open.js
Module not found: Error: Cannot resolve module 'tap' in C:\dev\projects\titler\node_modules\webpack\node_modules\watchpack\node_modules\graceful-fs\test
 @ (webpack)/~/watchpack/~/graceful-fs/test/open.js 1:11-25

You must be including require('webpack') in your webpack config file - test once with removing that, worked for me.