Fixup for ethers new version

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.20.2",
+  "version": "0.20.3",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",

src/services/Integrator/schemas/info-schema.ts

@@ -3,7 +3,7 @@ import { ethers } from 'ethers';
 
 const infoSchema = z.object({
   blockNumber: z.number().int().nonnegative(),
-  blockHash: z.string().refine((v) => v.length === 0 || ethers.utils.isHexString(v), {
+  blockHash: z.string().refine((v) => v.length === 0 || ethers.isHexString(v), {
     message: 'blockHash must be a valid hex string or empty',
   }),
   timeRequest: z.number().int().nonnegative(),

src/services/Integrator/schemas/util-schemas.ts

@@ -3,12 +3,12 @@ import { z } from 'zod';
 
 export const evmAddressSchema = z
   .string()
-  .refine(ethers.utils.isAddress, (v) => ({
+  .refine(ethers.isAddress, (v) => ({
     message: `${v} is not a valid address`,
   }));
 
 export const hexStringSchema = z
   .string()
-  .refine(ethers.utils.isHexString, (v) => ({
+  .refine(ethers.isHexString, (v) => ({
     message: `${v} is not a valid hex string`,
   }));