The Intel® Solid-State Drive Firmware Update Tool (FUT) provides the latest firmware for different models of Intel® SSD's. However, the firmware version L2010420 or 0420 is the latest for the Intel® SSD 730 Series.
FUT 2.0.13 does not contain any firmware update for the Intel® SSD 730 Series, but we would expect any new firmware releases to be provided through future versions Intel® SSD Firmware Update Tool and Intel® SSD Toolbox.
Regarding you inquiry for a history of firmware releases, please check the following items which can be found in the download page of Intel® SSD FUT:
1. There is a link to Release Notes in the top-right section of the FUT's download page. The release notes contain a history of firmware releases for each SSD model, as well as the fixes and enhancements provided with each version.
2. The firmware versions contained in a given release of FUT or SSD Toolbox are listed in the Detailed Description of the Download, so you can check if the one in your SSD is older/newer than the one provided in the Tool.