Migrate from TSLint to ESLint; update few other deps to latest

.gitignore

@@ -220,5 +220,6 @@ dist/lib/dlls/**/*
 
 *.d.ts.map
 *.js
+!eslint.config.js
 coverage/
 dlls/

.prettierignore

@@ -0,0 +1,5 @@
+*.json
+*.md
+*.jsonc
+.prettierrc
+azure-pipelines.yml

.vscode/settings.json

@@ -1,5 +1,5 @@
 {
     "cSpell.words": [
-        "yzhang"
-    ]
+    ],
+    "azure-pipelines.1ESPipelineTemplatesSchemaFile": true
 }

azure-pipelines.yml

@@ -22,6 +22,10 @@ pool:
 steps:
 - script: npm ci
   displayName: npm ci
+- script: npm run lint
+  displayName: lint
+- script: npm run prettier
+  displayName: prettier
 - script: npm test
   displayName: test
 - script: npm pack

eslint.config.js

@@ -0,0 +1,51 @@
+// @ts-check
+
+// This file contents based on:
+// https://typescript-eslint.io/getting-started#step-2-configuration
+// https://typescript-eslint.io/getting-started/typed-linting
+
+import eslint from "@eslint/js"
+import { dirname } from "path"
+import tseslint from "typescript-eslint"
+import { fileURLToPath } from "url"
+
+// Needed to support Node < 20.11 per:
+// https://stackoverflow.com/questions/46745014/alternative-for-dirname-in-node-js-when-using-es6-modules
+// as linked from: https://typescript-eslint.io/getting-started/typed-linting
+const __dirname = dirname(fileURLToPath(import.meta.url))
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  ...tseslint.configs.recommendedTypeChecked,
+  {
+    languageOptions: {
+      parserOptions: {
+        project: true,
+        tsconfigRootDir: __dirname
+      }
+    }
+  },
+  {
+    // Based on https://eslint.org/docs/latest/use/configure/configuration-files#globally-ignoring-files-with-ignores
+    ignores: ["**/dist"]
+  },
+  {
+    rules: {
+      // Rules disabled as part of migration from tslint
+      // https://github.com/Azure/openapi-diff/pull/335
+      "@typescript-eslint/no-explicit-any": "off",
+      "@typescript-eslint/no-unnecessary-type-assertion": "off",
+      "@typescript-eslint/no-unsafe-argument": "off",
+      "@typescript-eslint/no-unsafe-assignment": "off",
+      "@typescript-eslint/no-unsafe-call": "off",
+      "@typescript-eslint/no-unsafe-member-access": "off",
+      "@typescript-eslint/no-unsafe-return": "off",
+      "@typescript-eslint/no-unused-vars": "off",
+      "@typescript-eslint/no-var-requires": "off",
+      "@typescript-eslint/restrict-template-expressions": "off",
+      "no-constant-condition": "off",
+      "no-useless-escape": "off",
+      "prefer-const": "off"
+    }
+  }
+)