[Attestation] Add linting and coverage (#13221)

sdk/attestation/attestation/package.json

@@ -26,6 +26,7 @@
   },
   "devDependencies": {
     "@azure/dev-tool": "^1.0.0",
+    "@azure/eslint-plugin-azure-sdk": "^3.0.0",
     "@azure/test-utils-recorder": "^1.0.0",
     "@microsoft/api-extractor": "7.7.11",
     "@opentelemetry/api": "^0.10.2",
@@ -38,6 +39,7 @@
     "chai": "^4.2.0",
     "chai-as-promised": "^7.1.1",
     "dotenv": "^8.2.0",
+    "eslint": "^7.15.0",
     "jsrsasign": "^10.1.4",
     "karma": "^5.1.0",
     "karma-chrome-launcher": "^3.0.0",
@@ -54,6 +56,7 @@
     "karma-remap-istanbul": "^0.6.0",
     "karma-source-map-support": "~1.4.0",
     "mocha": "^7.1.1",
+    "nyc": "^14.0.0",
     "prettier": "^1.16.4",
     "rimraf": "^3.0.0",
     "rollup": "^1.16.3",
@@ -89,8 +92,8 @@
     "integration-test:browser": "karma start --single-run",
     "integration-test:node": "nyc mocha -r esm --require source-map-support/register --reporter ../../../common/tools/mocha-multi-reporter.js --timeout 5000000 --full-trace \"dist-esm/test/{,!(browser)/**/}*.spec.js\"",
     "integration-test": "npm run integration-test:node && npm run integration-test:browser",
-    "lint:fix": "echo skipped",
-    "lint": "echo skipped",
+    "lint:fix": "eslint package.json api-extractor.json test --ext .ts --fix --fix-type [problem,suggestion]",
+    "lint": "eslint package.json api-extractor.json test --ext .ts",
     "pack": "npm pack 2>&1",
     "prebuild": "npm run clean",
     "test": "npm run clean && npm run build:test && npm run unit-test",