* fix(ctb): rename token factory to erc20 factory

With the intent of mirroring the naming of the ERC721 bridge, I'm
renaming the OptimismMintableTokenFactory to
OptimismMintableERC20Factory.

* contracts-bedrock: fix test

* contracts-bedrock: snapshot
Co-authored-by: Mark Tyneway <mark.tyneway@gmail.com>