unp: fix https, sha 256, remove require

Formula/unp.rb

@@ -1,28 +1,26 @@
-require 'formula'
-
 class Unp < Formula
-  homepage 'http://packages.debian.org/source/stable/unp'
-  url 'http://mirrors.kernel.org/debian/pool/main/u/unp/unp_2.0~pre4.tar.gz'
-  mirror 'http://ftp.us.debian.org/debian/pool/main/u/unp/unp_2.0~pre4.tar.gz'
-  sha1 '6c07989297a1f15bd629bd64ff02d6cd13919775'
-  version '2.0-pre4'
+  homepage "https://packages.debian.org/source/stable/unp"
+  url "https://mirrors.kernel.org/debian/pool/main/u/unp/unp_2.0~pre4.tar.gz"
+  mirror "https://ftp.us.debian.org/debian/pool/main/u/unp/unp_2.0~pre4.tar.gz"
+  sha256 "25ecea61a68408f69618502132bf8edb350355fc8ef72ae5b20456d7850331bf"
+  version "2.0-pre4"
 
   devel do
-    url 'http://mirrors.kernel.org/debian/pool/main/u/unp/unp_2.0~pre7+nmu1.tar.bz2'
-    mirror 'http://ftp.us.debian.org/debian/pool/main/u/unp/unp_2.0~pre7+nmu1.tar.bz2'
-    sha1 'b91f4cbc4720b3aace147652ac2043cf74668244'
-    version '2.0-pre7-nmu1'
+    url "https://mirrors.kernel.org/debian/pool/main/u/unp/unp_2.0~pre7+nmu1.tar.bz2"
+    mirror "https://ftp.us.debian.org/debian/pool/main/u/unp/unp_2.0~pre7+nmu1.tar.bz2"
+    sha256 "7c2d6f2835a5a59ee2588b66d8015d97accd62e71e38ba90ebd4d71d8fd78227"
+    version "2.0-pre7-nmu1"
   end
 
-  depends_on 'p7zip'
+  depends_on "p7zip"
 
   def install
     bin.install %w[unp ucat]
     man1.install "debian/unp.1"
-    bash_completion.install 'bash_completion.d/unp'
+    bash_completion.install "bash_completion.d/unp"
     %w[ COPYING CHANGELOG ].each { |f| rm f }
-    mv 'debian/README.Debian', 'README'
-    mv 'debian/copyright', 'COPYING'
-    mv 'debian/changelog', 'ChangeLog'
+    mv "debian/README.Debian", "README"
+    mv "debian/copyright", "COPYING"
+    mv "debian/changelog", "ChangeLog"
   end
 end