Use specific versions for tests

Author: Olical

.github/workflows/test.yaml

@@ -7,9 +7,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macOS-latest]
-
-        # TODO Reinstate "v0.10.4" once it works through mise again.
-        neovim-version: ["v0.9.5", "stable", "nightly"]
+        neovim-version: ["v0.9.5", "v0.10.4", "v0.11.3"]
 
     runs-on: ${{ matrix.os }}