Updating failing specs and dependencies to latest

[jwoertink]

Closes #36
Fixes #38
Fixes #39

This PR does a few things:

• Update the CI to remove the cron schedule. Github will disable it if there's no activity after a bit, and this shard isn't updated often enough to keep that going
• Update LuckyFlow to the latest version and setup Webless. The specs no long need a chromedriver to run which allows them to run a lot faster with less dependencies
• Updated the CI to include windows so we can start testing this against windows.
• I set the min Crystal version to 1.4, though I imagine we need at least 1.6 or latest for all the Window stuff..

[jwoertink]

Looks like Flow still isn't Windows ready. Selenium has an issue open crystal-loot/selenium.cr#31 but I'd assume this shard will still work on Windows, just without being able to run specs....

[beta-ziliani]

Per crystal-lang/crystal#13131 the OS-independent way to kill a process is Process#terminate

[jwoertink]

Yup! Already got a PR up on Selenium crystal-loot/selenium.cr#33 😄 I'll get that merged in, then get LuckyFlow updated, then update this shard and the yak will be clean shaven!