Arti 0.6.0

The current crate versions are:

```
tor-basic-utils  0.3.3
caret            0.2.1
fs-mistrust      0.4.0
safelog          0.1.2
retry-error      0.2.1
tor-error        0.3.2
tor-config       0.5.0
tor-events       0.3.2
tor-units        0.3.1
tor-rtcompat     0.5.0
tor-rtmock       0.4.1
tor-llcrypto     0.3.3
tor-protover     0.3.1
tor-bytes        0.5.0
tor-socksproto   0.5.0
tor-checkable    0.3.1
tor-cert         0.5.0
tor-linkspec     0.4.0
tor-cell         0.5.0
tor-proto        0.5.0
tor-netdoc       0.5.0
tor-consdiff     0.3.1
tor-netdir       0.5.0
tor-persist      0.5.0
tor-chanmgr      0.5.0
tor-guardmgr     0.5.0
tor-circmgr      0.4.0
tor-dirclient    0.4.0
tor-dirmgr       0.6.0
arti-client      0.5.0
arti-config      0.4.1
arti-hyper       0.5.0
arti             0.6.0
arti-bench       0.6.0
arti-testing     0.6.0
```

				* * *

    “Ah!” replied my gentle fair,
    “Belovéd, what are names but air?
    Choose thou whatever suits the line:
    Call me Sappho, call me Chloris,
    Call me Lalage, or Doris,
    Only, only, call me thine.”
        —Samuel Taylor Coleridge
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