ci: add injection tests

tests/query/injections/yaml/bash-on-github-actions.yml

@@ -0,0 +1,32 @@
+name: CI
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '16'
+      - name: Install dependencies
+        run: npm ci
+      #      ^ bash
+      - name: Run tests
+        run: npm test
+      #      ^ bash
+      - name: Parse Petalisp
+        run: |
+          git submodule init
+          git submodule update
+          if (( $(node_modules/tree-sitter-cli/tree-sitter parse test/Petalisp/**/*.lisp -q | wc -l) > 2 )); then # There are 2 known failures (strings that are not format strings but use ~X syntax)
+            exit 1 
+          else
+            echo "Successfully parsed Petalisp"
+          fi
+      #    ^ bash
+      - name: Run tests
+        run: npm test