Correct minimal versions.

  - Versions required by feature or API usage:

    - anyhow 1.0.18.
      - policy::test::reject_seip_packet and
        policy::test::reject_cipher' fail
      - We use `impl From<anyhow::Error> for Box<dyn std::error::Error +
        Send + Sync + 'static>`, introduced in 1.0.5.

    - tokio 0.2.19
      - We use `tokio::net::tcp::OwnedReadHalf`, introduced in 0.2.19.

    - chrono 0.4.10
      - We use the `std` feature, introduced in 0.4.10.

    - thiserror 1.0.2

    - futures and futures-util 0.3.5

    - tempfile 3.1
      - c_doctests require the same version of rand both as direct
        dependency and through tempfile.

  - Yanked versions:
    - structopt 0.3.11. 0.3.8 to 0.3.10 were yanked.
    - socket2 0.3.16. 0.3.0 to 0.3.15 were yanked.

  - Update our dependencies to the package versions required by other
    dependencies, e.g. structopt requires lazy_static 1.4.0.
    - clap 2.33
    - lazy_static to 1.4.0
    - libc to 0.2.66
    - proc-macro2 to 1.0.7
    - syn to 1.0.5.
    - winapi 0.3.8

1 files changed, 1 insertions, 1 deletions

diff --git a/guide/Cargo.toml b/guide/Cargo.toml
index a3daf8c8..ce67da8c 100644
--- a/guide/Cargo.toml
+++ b/guide/Cargo.toml
@@ -13,4 +13,4 @@ build = "build.rs"
 
 [dependencies]
 sequoia-openpgp = { path = "../openpgp", version = "0.20" }
-anyhow = "1"
+anyhow = "1.0.18"