[RRFC] delete node_modules folder on npm ci failure

[isaacs]

Right now npm ci doesn't do any cleanup when it fails. This is hazardous because the node_modules folder might be in a broken state, but since npm ci also doesn't do any staging step, the broken packages are in place and require()-able.

Since npm ci always starts from (or creates) a clean slate, it should remove the node_modules folder if the installation fails.

[ChALkeR]

Thanks for the update!

[ruyadorno]

@claudiahdz is this still the case in current v7.0.0-beta branch?