vlang: revision

* vlang: add livecheck block
* vlang: adhere to the new release convention
  Related: https://github.com/vlang/v/issues/7058

Closes #66181.

Signed-off-by: Sean Molenaar <1484494+SMillerDev@users.noreply.github.com>
Signed-off-by: BrewTestBot <1589480+BrewTestBot@users.noreply.github.com>

Formula/vlang.rb

@@ -2,9 +2,16 @@ class Vlang < Formula
   desc "V programming language"
   homepage "https://vlang.io"
   # NOTE: Keep this in sync with V compiler below when updating
-  url "https://github.com/vlang/v/archive/0.1.30.tar.gz"
-  sha256 "5f2be9765e7ec6fb79286b973d319359377dcf78a0470652048a261d77a6ae14"
+  url "https://github.com/vlang/v/archive/weekly.2020.48.2.tar.gz"
+  version "0.1.30"
+  sha256 "15921991779262dfcf01cc3399ceccd831588ce313b99a46dcb7bed9dbabcc2c"
   license "MIT"
+  revision 1
+
+  livecheck do
+    url "https://raw.githubusercontent.com/vlang/v/master/CHANGELOG.md"
+    regex(/## v?\s?(\d+(?:\.\d+)+)/i)
+  end
 
   bottle do
     cellar :any_skip_relocation