update `cli` so `flood.liquid()` uses correct `wethMintAmount` flag

[jbowen93]

When calling flood.liquid() The cli passesflags.wethMintAmountOwner and flags.wethMintAmountUser which don't exist.

The correct flag to use is flags.wethMintAmount which is set with --wethMintAmount (or -a)

Tests

Manually tested by running

./bin/run init -r $ETH_RPC_URL -k $PRIV_KEY -u $PRIV_KEY -s local.json -a 10