Require Go 1.18; Bump github.com/zclconf/go-cty from 1.10.0 to 1.11.0

[dependabot]

Bumps github.com/zclconf/go-cty from 1.10.0 to 1.11.0.

Changelog

Sourced from github.com/zclconf/go-cty's changelog.

1.11.0 (August 22, 2022)

Upgrade Notes

This release contains some changes to some aspects of the API that are either legacy or de-facto internal (from before the Go toolchain had an explicit idea of that). Any external module using these will experience these as breaking changes, but we know of no such caller and so are admitting these without a major release in the interests of not creating churn for users of the main API.

• encoding/gob support utilities removed: we added these as a concession to HashiCorp who wanted to try to send cty values over some legacy protocols/formats used by legacy versions of HashiCorp Terraform. In the end those efforts were not successful for other reasons and so no Terraform release ever relied on this functionality.

  encoding/gob support has been burdensome due to how its unmarshaler interface is defined and so cty values and types are no longer automatically compatible with encoding/gob. Callers should instead use explicitly-implemented encodings, such as the built-in JSON and msgpack encodings or external libraries which use the public cty API to encode and decode.

• cty now requires Go 1.18: although the main API is not yet making any use of type parameters, we've begun to adopt it in the hope of improving the maintainability of some internal details, starting with the backing implementation of set types.

  Since type parameters are not supported by earlier versions of the Go compiler, callers must upgrade to Go 1.18 before using cty v1.11.0 or later.

Other changes in this release

• cty: Improved performance when comparing nonzero numbers to zero, by performing a relatively-cheap sign check on both numbers before falling back on the more expensive general equality implementation. (#125)
• cty: It's now possible to use capsule types in the elements of sets. Previously cty would panic if asked to construct a value of a set type whose element type either is or contains a capsule type, but there is now explicit support for storing encapsulated values in sets and optional (but recommended) support for a custom hashing function per type in order to improve performance for sets with a large number of elements.
• convert: Unify will no longer panic when asked to find a common base type for a tuple type and a list of unknown element type, and will instead just signal that such a unification is not possible. (#126)
• stdlib: FlattenFunc will no longer panic if it encounters a null value of a type that would normally be subject to flattening. Instead, it will treat it in the same way as a null value of any non-flattenable type. (#129)

Commits

• 3792a7b v1.11.0
• f16c240 Update CHANGELOG.md
• 4d209ea stdlib: Don't panic if flatten finds a null list/set/tuple value
• 834994b Update CHANGELOG.md
• 24404ad convert: Fix panic when unifying tuple element types
• 97a685d go.mod: go get golang.org/x/text@v0.3.7
• da78a28 Update CHANGELOG.md
• 3c2818f cty: Optimize equality check for numbers of differing signs
• b66d00a cty: Allow capsule types inside set values
• 74095df set: Use type parameters for the Set, Rules, and Iterator types
• Additional commits viewable in compare view

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[kmoe]

As discussed elsewhere, cty 1.11.0 requires Go 1.18. In accordance with our Go version support policy, the minimum Go version required by terraform-exec is also now Go 1.18. I've updated the CI config to match this.

4795942 removes legacy CircleCI convenience Docker images and updates to the new host cimg (see https://discuss.circleci.com/t/legacy-convenience-image-deprecation/41034).

[radeksimko]

Thanks