Support for Crystal 1.0

[jwoertink]

The version specified in the shard.yml will fallback to crystal (~> 0.35, >= 0.35.1) by default.

schedule.cr/shard.yml

Line 7 in 64d69b6

crystal: 0.35.1

For this to work with Crystal 1.0, it'll need to be changed to crystal: ">= 0.35.1"

[phil294]

while this makes sense, crystal never complained to me when I used this library in a 1.x project.

[jwoertink]

We couldn't get specs to pass with it on Cable.cr without changing this. We ended up just removing this shard as a dependency.