jsonlint 1.6.0 (new formula)

Installable with `npm` but widely used so let's include it.

Closes #6848.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/jsonlint.rb

@@ -0,0 +1,20 @@
+require "language/node"
+
+class Jsonlint < Formula
+  desc "JSON parser and validator with a CLI"
+  homepage "https://github.com/zaach/jsonlint"
+  url "https://github.com/zaach/jsonlint/archive/v1.6.0.tar.gz"
+  sha256 "a7f763575d3e3ecc9b2a24b18ccbad2b4b38154c073ac63ebc9517c4cb2de06f"
+
+  depends_on "node"
+
+  def install
+    system "npm", "install", *Language::Node.std_npm_install_args(libexec)
+    bin.install_symlink Dir["#{libexec}/bin/*"]
+  end
+
+  test do
+    (testpath/"test.json").write('{"name": "test"}')
+    system "#{bin}/jsonlint", "test.json"
+  end
+end