Use babel correctly to support old browsers

modules/ppcp-button/.babelrc

@@ -0,0 +1,8 @@
+{
+	"presets": [
+		["@babel/preset-env", {
+			"useBuiltIns": "usage",
+			"corejs": "3.25.0"
+		}]
+	]
+}

modules/ppcp-button/package.json

@@ -3,7 +3,15 @@
   "version": "1.0.0",
   "license": "GPL-3.0-or-later",
   "main": "resources/js/button.js",
+  "browserslist": [
+    "> 0.5%",
+    "Safari >= 8",
+    "Chrome >= 41",
+    "Firefox >= 43",
+    "Edge >= 14"
+  ],
   "dependencies": {
+    "core-js": "^3.25.0",
     "deepmerge": "^4.2.2"
   },
   "devDependencies": {

modules/ppcp-button/yarn.lock

@@ -1262,9 +1262,9 @@ call-bind@^1.0.2:
     get-intrinsic "^1.0.2"
 
 caniuse-lite@^1.0.30001370:
-  version "1.0.30001390"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001390.tgz#158a43011e7068ef7fc73590e9fd91a7cece5e7f"
-  integrity sha512-sS4CaUM+/+vqQUlCvCJ2WtDlV81aWtHhqeEVkLokVJJa3ViN4zDxAGfq9R8i1m90uGHxo99cy10Od+lvn3hf0g==
+  version "1.0.30001393"
+  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001393.tgz"
+  integrity sha512-N/od11RX+Gsk+1qY/jbPa0R6zJupEa0lxeBG598EbrtblxVCTJsQwbRBm6+V+rxpc5lHKdsXb9RY83cZIPLseA==
 
 chalk@^2.0.0:
   version "2.4.2"
@@ -1351,6 +1351,11 @@ core-js-compat@^3.21.0, core-js-compat@^3.22.1:
     browserslist "^4.21.3"
     semver "7.0.0"
 
+core-js@^3.25.0:
+  version "3.25.0"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.25.0.tgz#be71d9e0dd648ffd70c44a7ec2319d039357eceb"
+  integrity sha512-CVU1xvJEfJGhyCpBrzzzU1kjCfgsGUxhEvwUV2e/cOedYWHdmluamx+knDnmhqALddMG16fZvIqvs9aijsHHaA==
+
 cross-env@^7.0.3:
   version "7.0.3"
   resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-7.0.3.tgz#865264b29677dc015ba8418918965dd232fc54cf"