Modernize CI actions and JavaScript development tooling

Author: thomashoneyman

.eslintrc.json

@@ -11,14 +11,14 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v6
         with:
           node-version: "24"
           cache: npm
       - name: Cache PureScript dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v5
         with:
           key: ${{ runner.os }}-spago-${{ hashFiles('spago.yaml', 'spago.lock', 'package-lock.json') }}
           path: |

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+import js from "@eslint/js";
+
+export default [
+  js.configs.recommended,
+  {
+    files: ["src/**/*.js"],
+    languageOptions: {
+      ecmaVersion: 6,
+      sourceType: "module"
+    },
+    rules: {
+      "strict": [2, "global"],
+      "block-scoped-var": 2,
+      "consistent-return": 2,
+      "eqeqeq": [2, "smart"],
+      "guard-for-in": 2,
+      "no-caller": 2,
+      "no-extend-native": 2,
+      "no-loop-func": 2,
+      "no-new": 2,
+      "no-param-reassign": 2,
+      "no-return-assign": 2,
+      "no-unused-expressions": 2,
+      "no-use-before-define": 2,
+      "radix": [2, "always"],
+      "indent": [2, 2],
+      "quotes": [2, "double"],
+      "semi": [2, "always"]
+    }
+  }
+];