rekahsoft-gnu: Upgrade terraform-provider-null@2.1.2 -> 3.1.0

However, continue to provide terraform-provider-null@2.1.2 as its the last
version comparable with terraform@0.11.15

rekahsoft-gnu/packages/terraform.scm

@@ -553,6 +553,30 @@ instead of @command{terraform-MAJOR.MINOR}.")))
 (define-public terraform-provider-null
   (make-terraform-provider
    (package
+     (name "terraform-provider-null")
+     (version "3.1.0")
+     (source (origin
+               (method git-fetch)
+               (uri (git-reference
+                     (url "https://github.com/terraform-providers/terraform-provider-null")
+                     (commit (string-append "v" version))))
+               (file-name (git-file-name name version))
+               (sha256
+                (base32
+                 "0s6j2py9bb3knrn0f8aga8ypkxj6v5ns08k7zgw26h3wwdxwyd12"))))
+     (build-system go-build-system)
+     (arguments
+      `(#:import-path "github.com/terraform-providers/terraform-provider-null"
+        #:install-source? #f))
+     (synopsis "Terraform null provider")
+     (description
+      "Terraform null provider.")
+     (home-page "https://github.com/terraform-providers/terraform-provider-null")
+     (license license:mpl2.0))))
+
+(define-public terraform-provider-null-2.1
+  (make-terraform-provider
+   (package/inherit terraform-provider-null
      (name "terraform-provider-null")
      (version "2.1.2")
      (source (origin
@@ -564,15 +588,8 @@ instead of @command{terraform-MAJOR.MINOR}.")))
                (sha256
                 (base32
                  "0di1hxmd3s80sz8hl5q2i425by8fbk15f0r4jmnm6vra0cq89jw2"))))
-     (build-system go-build-system)
-     (arguments
-      `(#:import-path "github.com/terraform-providers/terraform-provider-null"
-        #:install-source? #f))
-     (synopsis "Terraform null provider")
      (description
-      "Terraform null provider.")
-     (home-page "https://github.com/terraform-providers/terraform-provider-null")
-     (license license:mpl2.0))))
+      "Terraform null provider. Supports terraform => 0.11."))))
 
 (define-public terraform-provider-heroku
   (make-terraform-provider