refactor!: min node 18, adds ts, adds esm, adds vitest, adds biome

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .node-version
+          cache: npm
+
+      - run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Type check
+        run: npm run check-types
+
+      - name: Test
+        run: npm run test:terse

.github/workflows/publish.yml

@@ -0,0 +1,73 @@
+name: Publish
+
+on:
+  push:
+    branches: [ master ]
+
+permissions:
+  contents: write
+  id-token: write
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .node-version
+          registry-url: https://registry.npmjs.org
+          cache: npm
+
+      - run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Type check
+        run: npm run check-types
+
+      - name: Test
+        run: npm run test:terse
+
+      - name: Build
+        run: npm run build
+
+      - name: Resolve version bump
+        id: bump
+        run: |
+          LAST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
+          if [ -z "$LAST_TAG" ]; then
+            RANGE="HEAD"
+          else
+            RANGE="${LAST_TAG}..HEAD"
+          fi
+
+          BUMP=""
+          while IFS= read -r subject; do
+            [ -z "$subject" ] && continue
+            if echo "$subject" | grep -qE '^[a-z]+(\(.+\))?!:'; then
+              BUMP="major"; break
+            fi
+            if [ "$BUMP" != "minor" ] && echo "$subject" | grep -qE '^feat(\(.+\))?:'; then
+              BUMP="minor"
+            fi
+            if [ -z "$BUMP" ] && echo "$subject" | grep -qE '^fix(\(.+\))?:'; then
+              BUMP="patch"
+            fi
+          done < <(git log "$RANGE" --format="%s" --no-merges)
+
+          echo "type=$BUMP" >> "$GITHUB_OUTPUT"
+
+      - name: Publish
+        if: steps.bump.outputs.type
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          npm version "${{ steps.bump.outputs.type }}" -m "chore(release): %s"
+          git push --follow-tags
+          npm publish --provenance --access public

.gitignore

@@ -1,8 +1,10 @@
-# Logs
+node_modules/
+dist/
+*.tsbuildinfo
+.vite/
+coverage/
+.env
+.env.*
+!.env.example
+.DS_Store
 *.log
-
-# Editors
-.vscode
-
-# Dependency directory
-node_modules

.node-version

@@ -0,0 +1 @@
+22

README.md

@@ -12,11 +12,6 @@
 
 To compare JSON objects containing asset metadata for a digital library. Upon change of any metadata, we'd store these changes as an audit trail and email asset stakeholders for review and approval of the changes.
 
-## Dependencies
-
-diffler is written with Node v12 in mind.
-Tests depend on [Mocha](https://mochajs.org/).
-
 ## Usage
 
 [![npm version](https://badge.fury.io/js/diffler.png)](https://www.npmjs.com/package/diffler)
@@ -27,7 +22,7 @@ npm install diffler
 
 ### Params
 
-`obj1` and `obj2` are two JSON objects for comparison.
+`original` and `updated` are two JSON objects for comparison.
 
 ### Return
 
@@ -37,23 +32,49 @@ If different: A JSON object with preserved path structure. The resulting values
 
 ### Example
 
-```js
-const diffler = require("diffler");
+#### ESM
 
-const before = { name: "omgaz", location: "London" };
-const after = { name: "omgaz", location: "Melbourne" };
+```ts
+import diffler from 'diffler';
+
+const before = { name: 'omgaz', location: 'London' };
+const after = { name: 'omgaz', location: 'Melbourne' };
 
 const difference = diffler(before, after);
-console.log(difference); // { location: { from: "London", to: "Melbourne" } }
+console.log(difference); // { location: { from: 'London', to: 'Melbourne' } }
 ```
 
-## Tests
+#### CommonJS
 
-[![Build Status](https://travis-ci.org/omgaz/diffler.svg?branch=master)](https://travis-ci.org/omgaz/diffler)
+```js
+const diffler = require('diffler');
 
-If you'd like to run tests, check out the whole project. You'll need NodeJS installed. Tests use Mocha.
+const before = { name: 'omgaz', location: 'London' };
+const after = { name: 'omgaz', location: 'Melbourne' };
+
+const difference = diffler(before, after);
+console.log(difference); // { location: { from: 'London', to: 'Melbourne' } }
+```
+
+## Development
+
+Requires Node 18+.
 
 ```bash
-  npm install
-  npm test
+npm install
+npm test
+npm run build
 ```
+
+### Scripts
+
+| Command               | Description                   |
+| --------------------- | ----------------------------- |
+| `npm test`            | Run tests with Vitest         |
+| `npm run test:terse`  | Run tests with minimal output |
+| `npm run test:watch`  | Run tests in watch mode       |
+| `npm run lint`        | Check with Biome              |
+| `npm run lint:fix`    | Auto-fix with Biome           |
+| `npm run check-types` | TypeScript type checking      |
+| `npm run build`       | Build with Vite               |
+| `npm run bench`       | Run performance benchmark     |