[No Ticket] Better babel setup

package.json

@@ -64,8 +64,10 @@
     "tiny-hashes": "1.0.1"
   },
   "devDependencies": {
-    "@babel/preset-env": "^7.22.5",
-    "@rollup/plugin-babel": "^6.0.3",
+    "@babel/plugin-transform-runtime": "^7.24.0",
+    "@babel/preset-env": "^7.24.0",
+    "@babel/runtime-corejs3": "^7.24.0",
+    "@rollup/plugin-babel": "^6.0.4",
     "@rollup/plugin-commonjs": "^25.0.4",
     "@rollup/plugin-node-resolve": "^15.2.1",
     "@rollup/plugin-replace": "^5.0.2",
@@ -89,10 +91,11 @@
     "@wdio/local-runner": "^8.32.4",
     "@wdio/mocha-framework": "^8.32.4",
     "@wdio/spec-reporter": "^8.32.4",
+    "babel-plugin-polyfill-corejs3": "^0.10.4",
     "chai": "^4.3.7",
     "chai-spies": "^1.0.0",
     "compression": "^1.7.4",
-    "core-js": "^3.31.0",
+    "core-js-pure": "^3.36.0",
     "cors": "^2.8.5",
     "dirty-chai": "^2.0.1",
     "eslint": "^8.43.0",

rollup/babel-prebid.json

@@ -0,0 +1,23 @@
+{
+  "presets": [
+    [
+      // despite the name this will only do syntax transformations
+      "@babel/preset-env"
+    ]
+  ],
+  "plugins": [
+    [
+      // replace babel helpers with imports
+      "@babel/plugin-transform-runtime"
+    ],
+    [
+      // install pure polyfills
+      "polyfill-corejs3",
+      {
+        "method": "usage-pure",
+        "version": "3.3"
+      }
+    ]
+  ],
+  "targets": "> 0.25%, not IE 11, not op_mini all" // keep in sync with https://github.com/prebid/Prebid.js/blob/master/package.json#L20
+}

rollup/babel-test-resources.json

@@ -0,0 +1,23 @@
+{
+  "presets": [
+    [
+      // despite the name this will only do syntax transformations
+      "@babel/preset-env"
+    ]
+  ],
+  "plugins": [
+    [
+      // replace babel helpers with imports
+      "@babel/plugin-transform-runtime"
+    ],
+    [
+      // install pure polyfills
+      "polyfill-corejs3",
+      {
+        "method": "usage-pure",
+        "version": "3.3"
+      }
+    ]
+  ],
+  "targets": "safari 10, chrome 45, firefox 52, not dead, > 0.2%"
+}