Drafts

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All draft contracts were either moved into a different directory or removed from the OpenZeppelin Contracts library on the v3.0.0 release.

ERC20Migrator: removed.
ERC20Snapshot: moved to token/ERC20.
ERC20Detailed and ERC1046: removed.
TokenVesting: removed. Pending a replacement that is being discussed in #1214.
Counters: moved to utils.
Strings: moved to utils.
SignedSafeMath: moved to utils.

Removed contracts are still available on the v2.5 release of OpenZeppelin Contracts, which you can install by running:

$ npm install @openzeppelin/[email protected]

Refer to the [v2.x documentation] when working with them.