ci(pre-commit): install required dependencies (#235)

* ci: install lua, luarocks, luacheck and neovim

* chore: add gitignore

This is necessary due to leafo/gh-actions-lua installing lua and
luarocks in working directory (see 1) which causes
peter-evans/create-pull-request to pick them up as wanted changes.

1) leafo/gh-actions-lua#15

.github/workflows/pre-commit-autoupdate.yml

@@ -11,13 +11,19 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+      - uses: leafo/gh-actions-lua@v9
+        with:
+          luaVersion: "5.1"
+      - uses: leafo/gh-actions-luarocks@v4
+      - name: Install luacheck
+        run: luarocks install luacheck
+      - uses: rhysd/action-setup-vim@v1
+        with:
+          neovim: true
       - uses: actions/[email protected]
       - run: pip install pre-commit
-        shell: bash
       - run: pre-commit autoupdate
-        shell: bash
       - run: pre-commit run --all-files
-        shell: bash
       - uses: peter-evans/create-pull-request@v4
         with:
           token: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -0,0 +1,2 @@
+.lua
+.luarocks