chore: add lint to pipeline

.github/workflows/lint.yml

@@ -0,0 +1,15 @@
+name: Lint
+on:
+  push:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '20'
+      - run: npm install
+      - run: npm run build
+      - run: npm run lint

package.json

@@ -14,7 +14,8 @@
     "url": "https://github.com/curvefi/curve-lending-js/issues"
   },
   "scripts": {
-    "build": "rm -rf lib && tsc -p tsconfig.build.json"
+    "build": "rm -rf lib && tsc -p tsconfig.build.json",
+    "lint": "eslint src --ext .ts"
   },
   "type": "module",
   "devDependencies": {