* Update contract address validations in swaps for different networks
* Add support for direct contract swaps for wrapping and unwrapping
* Add WETH_RINKEBY_CONTRACT_ADDRESS
* Fix Jest unit tests
* Provider correct getGasFeeTimeEstimate call to Gas Timing
* Fix tests for correct getGasFeeTimeEstimate method name
* Rename instances to getGasFeeTimeEstimate
Co-authored-by: David Walsh <davidwalsh83@gmail.com>
Co-authored-by: Dan Miller <danjm.com@gmail.com>