Fix basic broken stuff

Gulpfile.js

@@ -226,7 +226,8 @@ function buildRollup(packages) {
               rollupBabel({
                 envName: "rollup",
                 babelrc: false,
-                extends: "./.babelrc.js",
+                exclude: "**/node_modules/**",
+                extends: "./babel.config.js",
               }),
               rollupNodeGlobals({ sourceMap: false }),
               rollupCommonJs(),
@@ -250,8 +251,6 @@ function buildRollup(packages) {
   );
 }
 
-gulp.task("default", ["build"]);
-
 // These are bundles which are placed in lib and
 // serve as the commonjs npm package source
 const libBundles = [
@@ -308,6 +307,8 @@ gulp.task(
   })
 );
 
+gulp.task("default", gulp.series("build"));
+
 registerStandalonePackageTask(
   gulp,
   "babel",

babel.config.js

@@ -13,7 +13,6 @@ module.exports = function(api) {
 
   let convertESM = true;
   let ignoreLib = true;
-  let includeRuntime = false;
 
   switch (env) {
     // Configs used during bundling builds.
@@ -24,8 +23,6 @@ module.exports = function(api) {
     case "standalone":
     case "rollup":
       convertESM = false;
-      ignoreLib = false;
-      includeRuntime = true;
       break;
     case "production":
       // Config during builds before publish.
@@ -112,9 +109,6 @@ module.exports = function(api) {
           "packages/babel-runtime",
           /[\\/]node_modules[\\/](?:@babel\/runtime|babel-runtime|core-js)[\\/]/,
         ],
-        plugins: [includeRuntime ? "@babel/transform-runtime" : null].filter(
-          Boolean
-        ),
       },
     ].filter(Boolean),
   };