fix: catch up to recent upstream changes

web3.js/src/index.js

@@ -2,7 +2,9 @@
 export {Account} from './account';
 export {BudgetProgram} from './budget-program';
 export {Connection} from './connection';
+export {Loader} from './loader';
+export {NativeLoader} from './native-loader';
 export {PublicKey} from './publickey';
 export {SystemProgram} from './system-program';
-export {Transaction} from './transaction';
 export {Token, TokenAmount} from './token-program';
+export {Transaction} from './transaction';