fix npm output: disable live progress

[milahu]

remove scrambled output from npm install

progress is enabled by default
instead of --no-progress, we could also use npm config set progress=false

for debugging, we could use --verbose or npm config set verbose=true
but this is too verbose for normal use

the root cause for the scrambled output is probably a buffer issue
so that \r is parsed wrong

before

> [email protected] preinstall /build/node_modules/aws4
> /build/node_modules/.hooks/preinstall
        ......] \ postinstall:readable-stream: info lifecycle readable-str0m

> @nodegui/[email protected] postinstall /build/node_modules/@nodegui/nodegui
> cross-env npm run setupqt && (node ./scripts/skip.js || npm run build:addon)

sh: /build/node_modules/.bin/cross-env: /usr/bin/env: bad interpreter: No such file or directory
npm ERR! code ELIFECYCLEifecycle @nodegui/[email protected]~post[0m
npm ERR! errno 126

after

> [email protected] preinstall /build/node_modules/aws4
> /build/node_modules/.hooks/preinstall

> @nodegui/[email protected] postinstall /build/node_modules/@nodegui/nodegui
> cross-env npm run setupqt && (node ./scripts/skip.js || npm run build:addon)

sh: /build/node_modules/.bin/cross-env: /usr/bin/env: bad interpreter: No such file or directory
npm ERR! code ELIFECYCLE
npm ERR! errno 126

... trying to build https://github.com/nodegui/svelte-nodegui-starter