Potential segfault in `localtime_r` invocations (bollard --> chrono)

[nickgerace]

Likely minimal impact for users. At the time of writing this issue, no safe upgrade is available.

Crate:         chrono
Version:       0.4.19
Title:         Potential segfault in `localtime_r` invocations
Date:          2020-11-10
ID:            RUSTSEC-2020-0159
URL:           https://rustsec.org/advisories/RUSTSEC-2020-0159
Solution:      No safe upgrade is available!
Dependency tree: 
chrono 0.4.19
├── bollard-stubs 1.41.0
│   └── bollard 0.11.0
│       └── bovine 1.0.2
└── bollard 0.11.0