Prevent eventmachine from installing 1.2.x - #206

Description

I'm using Puffing Billy in conjunction with Sauce Connect (and a PAC file when launching Sauce Connect) to run tests in Sauce Labs. After updating Puffing Billy to 0.11.0 recently, I was running into issues with this setup where any request would result in a 502 Bad Gateway error in the browser, because of connection error: Connection refused from Sauce Connect. I rolled Puffing Billy back to an earlier version that worked for this configuration to verify that it was an issue caused by the Puffing Billy update.

Using git bisect I tracked the root cause to the changes to the gemspec in this commit. I was able to work out that the problem only exists when updating eventmachine past version 1.0.9.1.

This change causes eventmachine to resolve to 1.0.9.1 and no higher version (next version released is 1.2.0, latest is 1.2.5 - eventmachine changelog)

Notes

There are a number of fixes in versions of eventmachine after 1.0.9.1. Further investigation should be taken into what about versions of eventmachine after 1.0.9.1 causes this issue, and how to resolve the root cause of that.

References

Commit that caused the issue
eventmachine changelog

Risks

Medium

• Verified that my usage of Puffing Billy isn't broken by this change
• Others using Puffing Billy may have different use cases to mine that could be affected