fix(evm-contracts): use different abi export syntax for webpack confi…

…guration (#782)

* use assert syntax

* Empty commit

packages/evm-contracts/source/index.ts

@@ -1,5 +1,5 @@
-export { default as ConsensusAbi } from "./abis/ConsensusV1.json" with { type: "json" };
-export { default as ERC1967ProxyAbi } from "./abis/ERC1967Proxy.json" with { type: "json" };
-export { default as MultiPaymentAbi } from "./abis/MultiPayment.json" with { type: "json" };
-export { default as UsernamesAbi } from "./abis/UsernamesV1.json" with { type: "json" };
+export { default as ConsensusAbi } from "./abis/ConsensusV1.json" assert { type: "json" };
+export { default as ERC1967ProxyAbi } from "./abis/ERC1967Proxy.json" assert { type: "json" };
+export { default as MultiPaymentAbi } from "./abis/MultiPayment.json" assert { type: "json" };
+export { default as UsernamesAbi } from "./abis/UsernamesV1.json" assert { type: "json" };
 export * from "./function-sigs.js";