code-server: Fix dependencies for Linuxbrew

libsecret is not spelled out explicitly in the dependencies, but
it's mentioned as a step here: coder/code-server#735 (comment)

X11 dependencies were also found by CI

Author: rwhogg

Formula/code-server.rb

@@ -15,7 +15,15 @@ class CodeServer < Formula
   depends_on "yarn" => :build
   depends_on "node"
 
+  unless OS.mac?
+    depends_on "pkg-config" => :build
+    depends_on "libsecret"
+    depends_on "linuxbrew/xorg/libxkbfile"
+    depends_on "linuxbrew/xorg/libx11"
+  end
+
   def install
+    Language::Python.rewrite_python_shebang(Formula["[email protected]"].opt_bin/"python3") unless OS.mac?
     system "yarn", "--production"
     libexec.install Dir["*"]
     bin.mkdir