Bump github.com/zclconf/go-cty from 1.4.1 to 1.5.1

Bumps [github.com/zclconf/go-cty](https://github.com/zclconf/go-cty) from 1.4.1 to 1.5.1.
- [Release notes](https://github.com/zclconf/go-cty/releases)
- [Changelog](https://github.com/zclconf/go-cty/blob/master/CHANGELOG.md)
- [Commits](zclconf/go-cty@v1.4.1...v1.5.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

go.mod

@@ -7,5 +7,5 @@ require (
 	github.com/hashicorp/go-hclog v0.14.1
 	github.com/hashicorp/go-plugin v1.3.0
 	github.com/hashicorp/hcl/v2 v2.6.0
-	github.com/zclconf/go-cty v1.4.1
+	github.com/zclconf/go-cty v1.5.1
 )

go.sum

@@ -83,6 +83,8 @@ github.com/vmihailenco/msgpack v3.3.3+incompatible/go.mod h1:fy3FlTQTDXWkZ7Bh6Ac
 github.com/zclconf/go-cty v1.2.0/go.mod h1:hOPWgoHbaTUnI5k4D2ld+GRpFJSCe6bCM7m1q/N4PQ8=
 github.com/zclconf/go-cty v1.4.1 h1:Xzr4m4utRDhHDifag1onwwUSq32HLoLBsp+w6tD0880=
 github.com/zclconf/go-cty v1.4.1/go.mod h1:nHzOclRkoj++EU9ZjSrZvRG0BXIWt8c7loYc0qXAFGQ=
+github.com/zclconf/go-cty v1.5.1 h1:oALUZX+aJeEBUe2a1+uD2+UTaYfEjnKFDEMRydkGvWE=
+github.com/zclconf/go-cty v1.5.1/go.mod h1:nHzOclRkoj++EU9ZjSrZvRG0BXIWt8c7loYc0qXAFGQ=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=