git-credential-manager: depend on openjdk

Formula/git-credential-manager.rb

@@ -3,14 +3,18 @@ class GitCredentialManager < Formula
   homepage "https://docs.microsoft.com/vsts/git/set-up-credential-managers"
   url "https://github.com/Microsoft/Git-Credential-Manager-for-Mac-and-Linux/releases/download/git-credential-manager-2.0.4/git-credential-manager-2.0.4.jar"
   sha256 "fb8536aac9b00cdf6bdeb0dd152bb1306d88cd3fdb7a958ac9a144bf4017cad7"
+  revision 1
 
   bottle :unneeded
 
-  depends_on :java => "1.6+"
+  depends_on "openjdk"
 
   def install
     libexec.install "git-credential-manager-#{version}.jar"
-    bin.write_jar_script libexec/"git-credential-manager-#{version}.jar", "git-credential-manager"
+    (bin/"git-credential-manager").write <<~EOS
+      #!/bin/bash
+      exec "#{Formula["openjdk"].opt_bin}/java" -jar "#{libexec}/git-credential-manager-#{version}.jar" "$@"
+    EOS
   end
 
   test do