Use webdrivers.cr to auto-install the correct version

[paulcsmith]

https://github.com/matthewmcgarvey/webdrivers.cr

See https://gitter.im/luckyframework/Lobby?at=5ea98b753d58de7a38e36686

In lucky_flow, you'd update

lucky_flow/src/lucky_flow/chromedriver.cr

Line 17 in 26ebd2e

driver_path = LuckyFlow.settings.chromedriver_path ||

with Webdrivers::Chromedriver.install

We should probably make this configurable via Habitat. There may be people that do not want this, or environments where they want to use a preinstalled/vendored version

[matthewmcgarvey]

I'm not sure if it should go in this library our be included in the generated app. I'm considering that capybara does not include the webdrivers gem, but it has to be added to the app.

The generated app would have LuckyFlow configured like:

require "webdrivers"

LuckyFlow.configure do |settings|
  settings.chromedriver_path = Webdrivers::Chromedriver.install
end

[paulcsmith]

I think I'd prefer it to be in LuckyFlow so it "just works" out of the box. There are a lot of people that don't know about webdrivers and there's lives would be a lot happier with it I think 😂

But I think some people may not want it so as long as we have an option to disable it/provide your own path then I think it is probably the best of both worlds.