skip_download does not support boolean in Concourse 4.10

[samgurtman-zz]

After upgrading to 4.10, docker-image get failed when skip_download: true. Previously this worked. The workaround is to quote skip_download: 'true'.

[chrishiestand]

I've seen this before elsewhere. I'd guess this is a result of the underlying yaml library expecting yaml 1.1 instead of yaml 1.2.

[larssb]

Hmmm ... interesting to know. Had this issue as well. And as you @samgurtman describe, I was able to solve it by just quoting the boolean. Should this be fixed or should it "just" be documented on this resource?

[xtremerui]

With the latest concourse is this still a problem i.e. true needs to be quoted?

I think the problem is not related to yaml 1.1 vs 1.2 since true is a validate boolean in both versions. It should be caused by the go library that concourse used to parse yaml.