Make the package ESM-only and require Node.js >=14

Author: xxczaki

package.json

@@ -1,27 +1,25 @@
 {
     "name": "cashify",
-    "version": "2.5.0",
+    "version": "3.0.0",
     "description": "Lightweight currency conversion library, successor of money.js",
     "main": "dist/index.js",
-    "module": "dist/index.esm.js",
+    "type": "module",
     "types": "dist/index.d.ts",
     "files": [
         "dist/**/*"
     ],
-    "author": "Antoni Kepinski <a@kepinski.me> (https://kepinski.me)",
+    "author": "Antoni Kępiński <antoni@kepinski.ch> (https://www.kepinski.ch)",
     "bugs": {
         "url": "https://github.com/xxczaki/cashify/issues"
     },
     "scripts": {
         "prebuild": "del-cli dist",
-        "esm": "tsc --module esnext && cpy dist/index.js dist --rename index.esm.js",
-        "cjs": "tsc --module commonjs",
-        "build": "npm run esm && npm run cjs",
-        "test": "xo && nyc ava",
+        "build": "tsc",
+        "test": "xo && c8 ava",
         "prepublishOnly": "npm run build"
     },
     "engines": {
-        "node": ">=10"
+        "node": ">=14"
     },
     "license": "MIT",
     "repository": "xxczaki/cashify",
@@ -50,34 +48,42 @@
         "money-conversion"
     ],
     "devDependencies": {
-        "@akepinski/tsconfig": "0.0.2",
-        "@typescript-eslint/eslint-plugin": "^4.14.0",
-        "@typescript-eslint/parser": "^4.14.0",
+        "@sindresorhus/tsconfig": "^2.0.0",
+        "@types/big.js": "^6.1.2",
+        "@types/node": "^16.11.6",
         "ava": "^3.15.0",
-        "coveralls": "^3.1.0",
-        "cpy-cli": "^3.1.1",
-        "del-cli": "^3.0.1",
-        "eslint-config-xo-typescript": "^0.37.0",
-        "nyc": "^15.1.0",
-        "ts-node": "^9.1.1",
-        "type-fest": "^0.20.2",
-        "typescript": "^4.1.3",
-        "xo": "^0.37.1"
+        "big.js": "^6.1.1",
+        "c8": "^7.10.0",
+        "coveralls": "^3.1.1",
+        "del-cli": "^4.0.1",
+        "ts-node": "^10.4.0",
+        "typescript": "^4.4.4",
+        "xo": "^0.46.4"
     },
     "sideEffects": false,
     "ava": {
-        "extensions": [
-            "ts"
-        ],
-        "require": [
-            "ts-node/register"
+        "extensions": {
+            "ts": "module"
+        },
+        "nonSemVerExperiments": {
+            "configurableModuleFormat": true
+        },
+        "nodeArguments": [
+            "--loader=ts-node/esm"
         ]
     },
     "xo": {
-        "extends": "xo-typescript",
-        "extensions": [
-            "ts"
-        ]
+        "rules": {
+            "@typescript-eslint/naming-convention": "off"
+        }
+    },
+    "dependencies": {},
+    "peerDependencies": {
+        "big.js": ">=6.1.1"
     },
-    "dependencies": {}
+    "peerDependenciesMeta": {
+        "big.js": {
+            "optional": true
+        }
+    }
 }