Added initial implementation of time feature with support for unix sy… #21

cargo test (macos-11)

There are 0 failures, 0 warnings, and 0 notice.

Type	Count
error: internal compiler error	0
error	0
warning	0
failure-note	0
note	0
help	0

Name	Status
dirs::tests::test_sync_send	ok
fs::tests::basic	ok
time::unix::tests::test_binary_search	ok
dirs::tests::api_breakage	ok
src/open/url.rs:66 open::url::Url<'a>::new	ok
src/open/url.rs:96 open::url::Url<'a>::to_os_str	ok