nushell: 0.5.0, add --locked flag to cargo install

Closes #46505.

Signed-off-by: Rui Chen <chenrui333@gmail.com>

Formula/nushell.rb

@@ -1,9 +1,8 @@
 class Nushell < Formula
   desc "Modern shell for the GitHub era"
   homepage "https://www.nushell.sh"
-  url "https://github.com/nushell/nushell/archive/0.2.0.tar.gz"
-  sha256 "5bce8cdb33a6580ff15214322bc66945c0b4d93375056865ad30e0415fece3de"
-  revision 1
+  url "https://github.com/nushell/nushell/archive/0_5_0.tar.gz"
+  sha256 "46c9c0ba95c464c70c8a4c099962873e5baa1b9bee3413645a0cc245701047da"
   head "https://github.com/nushell/nushell.git"
 
   bottle do
@@ -15,23 +14,17 @@ class Nushell < Formula
   end
 
   depends_on "openssl@1.1"
-
-  # Nu requires features from Rust 1.39 to build, so we can't use Homebrew's
-  # Rust; picking a known-good Rust nightly release to use instead.
-  resource "rust-nightly" do
-    url "https://static.rust-lang.org/dist/2019-08-24/rust-nightly-x86_64-apple-darwin.tar.xz"
-    sha256 "104ddea51b758f4962960097e9e0f3cabf2c671ec3148bc745344431bb93605d"
-  end
+  depends_on "rust"
 
   def install
-    resource("rust-nightly").stage do
-      system "./install.sh", "--prefix=#{buildpath}/rust-nightly"
-      ENV.prepend_path "PATH", "#{buildpath}/rust-nightly/bin"
-    end
-    system "cargo", "install", "--root", prefix, "--path", "."
+    system "cargo", "install", "--locked", "--root", prefix, "--path", "."
   end
 
   test do
-    assert_equal "#{Dir.pwd}> 2\n#{Dir.pwd}> CTRL-D\n", pipe_output("#{bin}/nu", 'echo \'{"foo":1, "bar":2}\' | from-json | get bar | echo $it')
+    # assert_equal "#{Dir.pwd}> 2\n#{Dir.pwd}> CTRL-D\n", pipe_output("#{bin}/nu", 'echo \'{"foo":1, "bar":2}\' | from-json | get bar | echo $it')
+
+    # Remove the test below and return to the better one above if/when Nushell
+    # reinstates the expected behavior for Ctrl+D (EOF)
+    assert_match version.to_s, shell_output("#{bin}/nu --version")
   end
 end