Update solidity version on example contract

Add temp hash for executing hardhat function

Change hardhat.config.ts

Update package.json

Update package.json

Deprecate Rinkeby testnet and Migrate Goerli testnet

Update solidity version

Add .env.local

Apply hardhat-deploy

Change hardhat.config.ts

Add hardhat-gas-reporter

Update Solidity Version (0.8.7 -> 0.8.9)

Update hardhat.config.ts

Add test with typechain

Set chai-as-promised