* Change import path from zos-lib to upgrades in all contracts

* Update readme with new naming

* Update package and deps names

* Change path to initializable in AST of networks.jsons

* Migrate manifest version

* Use new oz file locations

* Rename in ERC20Migrator comments

* Update SDK install instructions in README

* Update gitignore to use new session file name

* trigger CI

* Fixes to readme and package version

* Use 2.5.0 release of OpenZeppelin SDK