Merge pull request #2836 from chaitanyapotti/1.0

fix to export isBigNumber

Author: nivida

packages/web3-utils/src/index.js

@@ -311,3 +311,4 @@ export const isTopic = utils.isTopic;
 export const bytesToHex = utils.bytesToHex;
 export const hexToBytes = utils.hexToBytes;
 export const stripHexPrefix = utils.stripHexPrefix;
+export const isBigNumber = utils.isBigNumber;