v2.2.1

This patch release includes several bugfixes, but the main change is the removal of openzeppelin-solidity as a dependency. This allows users of zos-lib to be able to use whichever version of openzeppelin they want, since truffle compilation fails to handle multiple versions of the same package in the same project (including transitive dependencies).

Changed

• Remove openzeppelin-solidity as a dependency (#739)

Fixed

• Provider initialization issue on zos check command (#737)
• Error messages that refer to truffle.js config file when actually it is truffle-config.js (#710)
• Error message "Cannot read zosversion of undefined" when attempting to create a contract on a new network that had not been push'ed to before (#711)
• Handle spaces in project path when compiling contracts (#743)