make the built output compatible with older browsers (see #446)

Author: josdejong

.browserslistrc

@@ -0,0 +1 @@
+IE 10

package-lock.json

@@ -38,18 +38,19 @@
     "prepublishOnly": "npm run test"
   },
   "devDependencies": {
-    "@types/node": "20.12.5",
     "@babel/core": "7.24.4",
     "@babel/preset-env": "7.24.4",
     "@rollup/plugin-babel": "6.0.4",
     "@rollup/plugin-commonjs": "25.0.7",
     "@rollup/plugin-json": "6.1.0",
     "@rollup/plugin-node-resolve": "15.2.3",
     "@rollup/plugin-terser": "0.4.4",
+    "@types/node": "20.12.5",
     "c8": "9.1.0",
+    "core-js": "3.37.1",
     "date-format": "4.0.14",
-    "fs-extra": "11.2.0",
     "find-process": "1.4.7",
+    "fs-extra": "11.2.0",
     "mocha": "10.4.0",
     "rollup": "4.14.0",
     "typescript": "5.4.4"

package.json

@@ -29,6 +29,7 @@ const commonPlugin = [
     babel({
         extensions: [".js", ".ts"],
         babelHelpers: "bundled",
+        presets: ['@babel/env']
     }),
 ];
 const commonOutput = {