chore(ci): some rewriting, and add test runner

.github/workflows/ci.yml

@@ -2,23 +2,26 @@ name: Format and lint
 on: [push, pull_request]
 
 jobs:
-  format:
-    name: stylua
+  lint:
+    name: lint and format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: JohnnyMorganz/stylua-action@1.0.0
+      - uses: actions/checkout@v3
+      - uses: JohnnyMorganz/stylua-action@v3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          version: 0.14.0
           args: --check .
-
-  lint:
-    name: selene
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
       - uses: NTBBloodbath/selene-action@v1.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           args: --display-style=quiet .
+
+  tests:
+    name: tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: MunifTanjim/setup-neovim-action@v1
+
+      - name: Run tests
+        run: make test