Duplicate identifier 'out' (with clean repro)

[DenisGorbachev]

Thanks for your work!

Here's a reproduction of the bug:

cd /tmp
git clone [email protected]:ShieldFinanceHQ/contracts.git
cd contracts
nvm install $(cat .nvmrc)
nvm use
npm install --global yarn
yarn install
yarn build
yarn typecheck

Expected output: blank (no type errors)

Actual output:

# Multiple errors, including:

typechain-types/UniswapV1Exchange.ts:875:59 - error TS2300: Duplicate identifier 'out'.

875     ): Promise<[BigNumber, BigNumber] & { out: BigNumber; out: BigNumber }>;