feat: use rollup and remove Buffer

package.json

@@ -3,10 +3,14 @@
   "version": "3.1.0",
   "description": "Bitcoin BIP39: Mnemonic code for generating deterministic keys",
   "type": "module",
+  "main": "src/cjs/index.cjs",
+  "module": "src/esm/index.js",
+  "types": "src/cjs/index.d.ts",
   "exports": {
     ".": {
-      "types": "./src/index.d.ts",
-      "import": "./src/index.js"
+      "types": "./src/cjs/index.d.ts",
+      "import": "./src/esm/index.js",
+      "require": "./src/cjs/index.cjs"
     },
     "./wordlists": {
       "import": "./src/wordlists"
@@ -43,7 +47,7 @@
     }
   },
   "scripts": {
-    "build": "npm run clean && tsc -p tsconfig.json",
+    "build": "rollup -c rollup.config.ts --configPlugin typescript",
     "clean": "rm -rf src",
     "coverage": "nyc --branches 85 --functions 100 --check-coverage npm run unit",
     "format": "npm run prettier -- --write",
@@ -72,16 +76,23 @@
     "src"
   ],
   "dependencies": {
-    "@noble/hashes": "^1.2.0"
+    "@noble/hashes": "^1.2.0",
+    "uint8array-tools": "^0.0.8"
   },
   "devDependencies": {
+    "@rollup/plugin-commonjs": "^25.0.7",
+    "@rollup/plugin-node-resolve": "^15.2.3",
+    "@rollup/plugin-terser": "^0.4.4",
+    "@rollup/plugin-typescript": "^11.1.6",
     "@types/node": "11.11.6",
     "node-fetch": "2.6.9",
     "nyc": "^15.0.0",
     "prettier": "1.16.4",
     "proxyquire": "^1.7.10",
+    "rollup": "^4.9.6",
     "tape": "^5.3.0",
     "tslint": "^6.1.0",
-    "typescript": "3.3.4000"
-  }
+    "typescript": "5.0.4"
+  },
+  "sideEffects": false
 }

rollup.config.ts

@@ -0,0 +1,42 @@
+import commonjs    from '@rollup/plugin-commonjs'
+import nodeResolve from '@rollup/plugin-node-resolve'
+import typescript  from '@rollup/plugin-typescript'
+import terser      from '@rollup/plugin-terser';
+
+
+const treeshake = {
+	moduleSideEffects       : false,
+	propertyReadSideEffects : false,
+	tryCatchDeoptimization  : false
+}
+
+const onwarn = (warning) => {
+  if (
+    warning.code === 'INVALID_ANNOTATION' && 
+    warning.message.includes('@__PURE__')
+  ) {
+    return
+  }
+  throw new Error(warning)
+}
+
+export default {
+  plugins: [ typescript(), nodeResolve(), commonjs() ],
+  input: 'ts_src/index.ts',
+  onwarn,
+  output: [
+    {
+      file: 'src/cjs/index.cjs',
+      format: 'cjs',
+      sourcemap: true,
+    },
+    {
+      file: 'src/esm/index.js',
+      format: 'es',
+      sourcemap: true,
+      minifyInternalExports: false
+    }
+  ],
+  strictDeprecations: true,
+  treeshake
+}