Karma has a non-dev dependency on chromium (via the puppeteer package)

[davidshepherd7]

This commit added puppeteer (which is a wrapper around headless chrome) as a non-dev dependency of karma. Previously karma had phantomjs-prebuilt as a dev dependency.

Presumably this change was unintentional? It's a bit annoying because it makes the install of karma take a long time.

Expected behaviour

Installing karma does not install any particular browser.

Actual behaviour

Installing karma installs chromium.

Environment Details

• Karma version (output of karma --version): Karma version: 3.1.0
• Relevant part of your karma.config.js file: N/A

Steps to reproduce the behaviour

1. npm install -D karma

[lukehutton]

I am also getting failures on all my builds after doing

npm install -g karma karma-cli bower gulp-cli protractor gulp

Is this relevant?

> puppeteer@1.9.0 install /root/.nvm/versions/node/v8.9.4/lib/node_modules/karma/node_modules/puppeteer
> node install.js

module.js:472
    throw err;
    ^

Error: Cannot find module '/root/.nvm/versions/node/v8.9.4/lib/node_modules/karma/node_modules/puppeteer/install.js'
    at Function.Module._resolveFilename (module.js:470:15)
    at Function.Module._load (module.js:418:25)
    at Module.runMain (module.js:605:10)
    at run (bootstrap_node.js:427:7)
    at startup (bootstrap_node.js:151:9)
    at bootstrap_node.js:542:3`

downgrading to npm install -g karma@3.0.0 seems to work

[WebTechnolog]

puppeteer also takes 303 Mb of disk space which equals to the "weight" of all other packages in my setup (Angular 7 app). It's very annoying