Upgrade to v3 of the protocol

https://github.com/sass/sass/tree/embedded-protocol-3.1.0

Closes #28

Author: bep

.github/workflows/test.yml

@@ -4,12 +4,12 @@ on:
   pull_request:
 name: Test
 env:
-  SASS_VERSION: 1.63.2
+  SASS_VERSION: 1.80.5
 jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.21.x, 1.22.x]
+        go-version: [1.22.x, 1.23.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps: