feat(wallet connect): sign payload using wc in test-dapp

[roxaneletourneau]

Added support to sign payload in the test-dapp using wallet connect, fix getPk and sign in the wallet connect package

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New packages have been deployed to the preview repository at https://npm.preview.tezostaquito.io/.

Published packages:

npm i @taquito/utils@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/http-utils@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/rpc@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/tzip12@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/contracts-library@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/tzip16@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/timelock@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/signer@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/wallet-connect-2@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/beacon-wallet@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/michelson-encoder@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/remote-signer@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/core@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/ledger-signer@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/michel-codec@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/local-forging@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/sapling@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/
npm i @taquito/taquito@20.1.0-7f70198-- --registry https://npm.preview.tezostaquito.io/

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[hui-an-yang]

lgtm