2019-02-06 - v1.0
 * initial release
2020-04-30 - v1.1
 * Clean up docs and remove extra space from hash output
2020-07-04 - v1.2
 * Use datetime2 instead of datetime to reduce dependancy burden
   and display dates in ISO format
2020-10-30 - v1.3
 * Support lualatex
2022-07-16 - v1.4
 * Detect running in online builders via "CLSI" environmental variable