gnu: Add rust-proptest-0.7.

* gnu/packages/crates-io.scm (rust-proptest-0.7): New variable.

gnu/packages/crates-io.scm

@@ -17129,6 +17129,34 @@ (define-public rust-proptest-0.8
        #:cargo-development-inputs
        (("rust-regex" ,rust-regex-1.1))))))
+(define-public rust-proptest-0.7
+  (package
+    (inherit rust-proptest-0.9)
+    (name "rust-proptest")
+    (version "0.7.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "proptest" version))
+        (file-name
+         (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "13giz85f7jkjc8miplzj4zh3fr704c1y1cg0dh218iw2dfkpbwi7"))))
+    (arguments
+     `(#:cargo-inputs
+       (("rust-bit-set" ,rust-bit-set-0.5)
+        ("rust-bitflags" ,rust-bitflags-1)
+        ("rust-lazy-static" ,rust-lazy-static-1)
+        ("rust-num-traits" ,rust-num-traits-0.2)
+        ("rust-quick-error" ,rust-quick-error-1.2)
+        ("rust-rand" ,rust-rand-0.4)
+        ("rust-regex-syntax" ,rust-regex-syntax-0.4)
+        ("rust-rusty-fork" ,rust-rusty-fork-0.2)
+        ("rust-tempfile" ,rust-tempfile-3))
+       #:cargo-development-inputs
+       (("rust-regex" ,rust-regex-0.2))))))
+
 (define-public rust-psm-0.1
   (package
     (name "rust-psm")