fix: increase Node memory limit to workaround webpack crash, fix #1453

[octref]

#1453 (comment)

@yyx990803 I've been running with this setting for a while and haven't encountered crashes any more.

[octref]

Well, the builds are failing probably because this hits the memory limit on CircleCI: https://circleci.com/docs/1.0/oom. Wondering what should we do here...

[octref]

The root cause seems to be webpack/webpack#6929.
I've been running this for a while, this lessens the issue but doesn't completely work around it. In 10-20 minutes of heavy editing I still get OOM error.

[DRoet]

@yyx990803 @octref the memory leaks found in webpack/webpack#6929 have been resolved in
https://github.com/webpack/webpack/releases/tag/v4.15.1

which might resolve the issues in #1453

[octref]

@DRoet Gave it a try, didn't help. webpack/webpack#6929 (comment)

[DRoet]

@octref a fix for another memory leak landed in:
https://github.com/postcss/postcss-loader/releases/tag/v2.1.6

I'll try and test it out later

[octref]

I'll open a new PR.