* replace gosigar with gopsutil
* removed check for whether GOOS is openbsd
* removed accidental import of runtime
* potential fix for difference in units between gosig and gopsutil
* fixed lint error
* remove multiplication factor
* uses cpu.ClocksPerSec as the multiplication factor
* changed dependency from shirou to renaynay (#20)
* updated dep
* switching back from using renaynay fork to using upstream as PRs were merged on upstream
* removed empty line
* optimized imports
* tidied go mod
