Add notice for Deno not following semver

[sno2]

As shown by denoland/deno#11340, highly impactive breaking changes will be introduced within minor versions of Deno. It is best to warn people of this and have them specify their minor versions as well to stop all CI breaking again the next time a big breaking change like this is introduced again.

[lucacasonato]

Our stability guarantees in general only cover runtime APIs (stable Deno namespace APIs, web APIs, type stripping), not auxiliary things like type checking or specific lint rules. Please see https://deno.land/manual@v1.12.0/runtime/stability

[sno2]

Our stability guarantees in general only cover runtime APIs (stable Deno namespace APIs, web APIs, type stripping), not auxiliary things like type checking or specific lint rules. Please see https://deno.land/manual@v1.12.0/runtime/stability

Yes, I am talking about the CLI. It will no longer type check by default if you do not add a CLI flag. If that can be included within a minor version bump then everyone must specify their minor versions.

[lucacasonato]

It is not yet decided that this will be included in a minor version, or what a possible migration path would look like.

[sno2]

It is not yet decided that this will be included in a minor version, or what a possible migration path would look like.

It is tagged for the 1.13 milestone and locked for discussion. I advise you say something in the issue as there has not been a single statement from core team that it will not be 1.13. Kitsonk did discuss it not being <2.0 in the original discussion a year ago but I don't think he still has the same opinion if he hasn't changed the milestone.