feat: add circular singly linked list

.babelrc

@@ -1,8 +1,13 @@
 {
   "presets": [
-    "@babel/preset-env"
+    ["@babel/preset-env", {
+      "shippedProposals": true
+    }]
   ],
   "plugins": [
+    ["@babel/plugin-proposal-class-properties", {
+      "loose": false
+    }],
     ["@babel/plugin-transform-runtime", {
       "regenerator": true
     }]

.eslintrc

@@ -1,13 +1,12 @@
 {
   "env": {
-    "node": true,
-    "es6": true,
-    "commonjs": true,
-    "browser": true
+    "browser": true,
+    "es2021": true,
+    "node": true
   },
+  "parser": "@babel/eslint-parser",
   "parserOptions": {
-    "parser": "babel-eslint",
-    "ecmaVersion": 2021,
+    "ecmaVersion": 12,
     "sourceType": "module",
     "ecmaFeatures": {
       "impliedStrict": true,

build/babel.config.js

@@ -1,16 +1,17 @@
 export default {
-  presets: [
-    [
-      '@babel/preset-env',
-      {
-        useBuiltIns: false,
-        modules: false
-      }
-    ]
-  ],
-  plugins: [
-    ['@babel/plugin-transform-runtime', {
-      regenerator: true
-    }]
-  ]
+	presets: [
+		['@babel/preset-env', {
+			shippedProposals: true,
+			useBuiltIns: false,
+			modules: false
+		}]
+	],
+	plugins: [
+		['@babel/plugin-proposal-class-properties', {
+			loose: false
+		}],
+		['@babel/plugin-transform-runtime', {
+			regenerator: true
+		}]
+	]
 }

lib/CircularSinglyLinkedList.js

@@ -30,7 +30,7 @@ export class CircularSinglyLinkedList {
 	 * @returns {Node}
 	 * @private
 	 */
-	#move(node, at) {
+	#move (node, at) {
 		const tmp = this.#findNodeBefore(node);
 
 		tmp.next = node.next;

package.json

@@ -50,18 +50,19 @@
     ]
   },
   "devDependencies": {
-    "@babel/core": "7.13.8",
+    "@babel/core": "7.14.3",
+    "@babel/eslint-parser": "7.14.4",
+    "@babel/plugin-proposal-private-methods": "7.13.0",
     "@babel/plugin-transform-runtime": "7.13.9",
-    "@babel/preset-env": "7.13.9",
+    "@babel/preset-env": "7.14.4",
     "@commitlint/cli": "12.0.1",
     "@commitlint/config-conventional": "12.0.1",
     "@rollup/plugin-babel": "5.3.0",
     "@rollup/plugin-commonjs": "17.1.0",
     "@rollup/plugin-node-resolve": "11.2.0",
-    "babel-eslint": "10.1.0",
     "core-js": "3.9.1",
     "cz-conventional-changelog": "3.3.0",
-    "eslint": "7.21.0",
+    "eslint": "7.28.0",
     "esm": "3.2.25",
     "husky": "4.3.8",
     "lint-staged": "10.5.4",