v4.0.0-beta.2

Changed

• Merge the registry and the factory (#81) (@PaulRBerg)
• Rename deployer to operator (#81) (@PaulRBerg)
• Set the owner via the transientProxyOwner storage variable (#81) (@PaulRBerg)
• Transfer ownership via the registry (#81) (@PaulRBerg)
• Bump submodules (@PaulRBerg)
• Improve documentation (@PaulRBerg)
• Make VERSION a string (699f76) (@PaulRBerg)

Added

• Add OpenZeppelin/openzeppelin-contracts submodule

Removed

• Breaking: Remove PRBProxyFactory contract (#81) (@PaulRBerg)
• Remove PaulRBerg/prb-contracts submodule