Log Message:
(net/R-pingr) Updated 2.0.2 to 2.0.4, make test passed

# pingr 2.0.4

* `ping()` now handles sub-millisecond response times (#24).

* `ping()` now works on FreeBSD, OpenBSD, NetBSD and DragonFlyBSD.

# pingr 2.0.3

* `ping_port()` now correctly prints the port if `version = TRUE`.