Upgrade to Webpack 4 - remove baseUrl property
Upgrade to Webpack 4 - remove baseUrl property

Signed-off-by: David Mehren <da2b6adb602d0f8120347f75db851fc80fc4ae26@gmail.com>

hackmdio/hackmd,Yukaii/hackmd,hackmdio/hackmd,jackycute/HackMD,Yukaii/hackmd,hackmdio/hackmd,jackycute/HackMD,jackycute/HackMD,Yukaii/hackmd