add num_complex_solidity (bkrem#114)

README.md

@@ -220,6 +220,7 @@
 - [OpenZeppelin/openzeppelin-contracts](https://github.com/OpenZeppelin/openzeppelin-contracts) - A library for secure smart contract development.
 - [OpenZeppelin/openzeppelin-contracts-upgradeable](https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable) - Upgradeable variant of OpenZeppelin Contracts, meant for use in upgradeable contracts.
 - [optionality/clone-factory](https://github.com/optionality/clone-factory) - Simple clone contract factory. Install a master copy of a contract, then easily (cheaply) create clones with separate state.
+- [partylikeits1983/num_complex_solidity](https://github.com/partylikeits1983/num_complex_solidity) - Smart contract library for handling complex numbers.
 - [pcaversaccio/xdeployer](https://github.com/pcaversaccio/xdeployer) - Hardhat plugin to deploy your smart contracts across multiple EVM chains with the same deterministic address.
 - [rugpullindex/indexed-sparse-merkle-tree](https://github.com/rugpullindex/indexed-sparse-merkle-tree) - Dapptools-ready and gas-optimized implementation of a sparse merkle tree.
 - [Smart Contracts Skeleton](https://github.com/Shimmi/smart-contracts-skeleton) - Preconfigured skeleton repository for building or starting with development of Smart contracts.