Log Message:
(sysutils/R-ps) Updated 1.6.0 to 1.7.5

# ps 1.7.5

# ps 1.7.4

* `ps::ps_get_cpu_affinity()` now works for other processes on Linux, not only
  the calling process.

# ps 1.7.3

* The output of `ps_disk_usage()`, `ps_disk_partitions()` and
  `ps_shared_lib_users()` now do not include a spurious `stringsAsFactors`
  column.

# ps 1.7.2

* `ps_system_memory()$percent` now returns a number scaled between 0 and 100
  on Windows, rather than between 0 and 1 (#131, @francisbarton).

# ps 1.7.1

* ps now returns data frames instead of tibbles. While data frames and
  tibbles are very similar, they are not completely compatible. To convert
  the output of ps to tibbles call the `tibble::as_tibble()` function
  on them.

* `ps()` now does not fail if both `user` and `after` are specified (#129).

# ps 1.7.0

* ps now compiles on platforms that enable OpenMP (#109).

* New functions `ps_get_cpu_affinity()` and `ps_set_cpu_affinity()` to query
  and set CPU affinity (#123).

* `ps_memory_info()` now does not mix up `rss` and `vms` on Linux.

* `ps_memory_info()` now reports memory in bytes instead of pages on Linux (#115)