feat: add rollup and esm, remove toCase

package.json

@@ -30,6 +30,14 @@
     "case.d.ts"
   ],
   "main": "dist/Case.js",
+  "module": "dist/Case.mjs",
+  "exports": {
+    ".": {
+      "import": "./dist/Case.mjs",
+      "require": "./dist/Case.js",
+      "default": "./dist/Case.js"
+    }
+  },
   "bugs": {
     "url": "http://github.com/nbubna/Case/issues",
     "email": "[email protected]"
@@ -40,6 +48,7 @@
   },
   "license": "(MIT OR GPL-3.0-or-later)",
   "scripts": {
+    "build": "rollup --config ./rollup.config.js",
     "test": "grunt qunit"
   },
   "devDependencies": {
@@ -52,7 +61,9 @@
     "grunt-contrib-qunit": "^3.1.0",
     "grunt-contrib-uglify": "^4.0.1",
     "grunt-contrib-watch": "^1.1.0",
-    "grunt-nuget": "~0.3.1"
+    "grunt-nuget": "~0.3.1",
+    "rollup": "^2.17.1",
+    "rollup-plugin-terser": "^6.1.0"
   },
   "typings": "case.d.ts"
 }

rollup.config.js

@@ -0,0 +1,42 @@
+// @ts-check
+
+import { terser } from 'rollup-plugin-terser';
+
+/**
+ * @type { import('rollup').RollupOptions }
+ */
+const config =  {
+    input: './src/Case.mjs',
+    output: [
+        {
+            file: './dist/Case.js',
+            format: 'umd',
+            name: 'Case',
+            sourcemap: true,
+            sourcemapExcludeSources: true,
+        },
+        {
+            file: './dist/Case.mjs',
+            format: 'esm',
+            sourcemap: true,
+            sourcemapExcludeSources: true,
+        },
+        {
+            file: './dist/Case.min.js',
+            format: 'umd',
+            name: 'Case',
+            sourcemap: true,
+            sourcemapExcludeSources: true,
+            plugins: [terser()],
+        },
+        {
+            file: './dist/Case.min.mjs',
+            format: 'esm',
+            sourcemap: true,
+            sourcemapExcludeSources: true,
+            plugins: [terser()],
+        },
+    ],
+};
+
+export default config;