Correct minimal versions.

  - Versions required by feature or API usage:

    - anyhow 1.0.5.
      - 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

14 files changed, 56 insertions, 57 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 96ba0e7b..924387f4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2173,11 +2173,11 @@ checksum = "fbee7696b84bbf3d89a1c2eccff0850e3047ed46bfcd2e92c29a2d074d57e252"
 
 [[package]]
 name = "socket2"
-version = "0.3.15"
+version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1fa70dc5c8104ec096f4fe7ede7a221d35ae13dcd19ba1ad9a81d2cab9a1c44"
+checksum = "2c29947abdee2a218277abeca306f25789c938e500ea5a9d4b12a5a504466902"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "libc",
  "redox_syscall",
  "winapi 0.3.9",
diff --git a/buffered-reader/Cargo.toml b/buffered-reader/Cargo.toml
index c00e7d39..2c424286 100644
--- a/buffered-reader/Cargo.toml
+++ b/buffered-reader/Cargo.toml
@@ -21,7 +21,7 @@ maintenance = { status = "actively-developed" }
 [dependencies]
 bzip2 = { version = "0.4", optional = true }
 flate2 = { version = "1.0.1", optional = true }
-libc = "0.2.33"
+libc = "0.2.66"
 
 [features]
 default = ["compression"]
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 17cbe911..e9352350 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -21,7 +21,7 @@ gitlab = { repository = "sequoia-pgp/sequoia" }
 maintenance = { status = "actively-developed" }
 
 [dependencies]
-anyhow = "1"
+anyhow = "1.0.5"
 dirs = "2.0"
 tempfile = "3.1"
-thiserror = "1"
+thiserror = "1.0.2"
diff --git a/ffi-macros/Cargo.toml b/ffi-macros/Cargo.toml
index b4b33b28..976bc32c 100644
--- a/ffi-macros/Cargo.toml
+++ b/ffi-macros/Cargo.toml
@@ -19,13 +19,13 @@ gitlab = { repository = "sequoia-pgp/sequoia" }
 maintenance = { status = "actively-developed" }
 
 [dependencies]
-lazy_static = "1.0.0"
-proc-macro2 = "1.0"
+lazy_static = "1.4.0"
+proc-macro2 = "1.0.7"
 quote = "1.0"
 sha2 = "0.8"
 
 [dependencies.syn]
-version = "1.0"
+version = "1.0.5"
 features = ["full"]
 
 [lib]
diff --git a/ffi/Cargo.toml b/ffi/Cargo.toml
index 504d0cce..eb4d2581 100644
--- a/ffi/Cargo.toml
+++ b/ffi/Cargo.toml
@@ -27,12 +27,12 @@ sequoia-openpgp = { path = "../openpgp", version = "0.20", default-features = fa
 sequoia-core = { path = "../core", version = "0.20" }
 sequoia-store = { path = "../store", version = "0.20", default-features = false }
 sequoia-net = { path = "../net", version = "0.20", default-features = false }
-anyhow = "1"
-lazy_static = "1.0.0"
-libc = "0.2.33"
+anyhow = "1.0.5"
+lazy_static = "1.4.0"
+libc = "0.2.66"
 memsec = { version = "0.6", default-features = false }
 native-tls = "0.2.0"
-tokio = { version = "0.2", features = ["rt-core", "io-driver", "io-util", "time"] }
+tokio = { version = "0.2.19", features = ["rt-core", "io-driver", "io-util", "time"] }
 
 [dev-dependencies]
 filetime = "0.2"
diff --git a/guide/Cargo.toml b/guide/Cargo.toml
index a3daf8c8..c927a7bb 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 = "1.0.5"
diff --git a/ipc/Cargo.toml b/ipc/Cargo.toml
index 3988506f..6b443693 100644
--- a/ipc/Cargo.toml
+++ b/ipc/Cargo.toml
@@ -23,31 +23,31 @@ maintenance = { status = "actively-developed" }
 sequoia-openpgp = { path = "../openpgp", version = "0.20", default-features = false }
 sequoia-core = { path = "../core", version = "0.20" }
 
-anyhow = "1"
+anyhow = "1.0.5"
 buffered-reader = { path = "../buffered-reader", version = "0.20", default-features = false }
 capnp-rpc = "0.13"
 fs2 = "0.4.2"
-futures = "0.3"
+futures = "0.3.5"
 lalrpop-util = "0.19"
-lazy_static = "1.3"
-libc = "0.2.33"
+lazy_static = "1.4.0"
+libc = "0.2.66"
 memsec = { version = "0.6", default-features = false }
 rand = { version = "0.7", default-features = false }
-tempfile = "3.0"
-thiserror = "1"
-tokio = { version = "0.2", features = ["rt-core", "rt-util", "tcp", "uds", "io-util", "macros"] }
+tempfile = "3.1"
+thiserror = "1.0.2"
+tokio = { version = "0.2.19", features = ["rt-core", "rt-util", "tcp", "uds", "io-util", "macros"] }
 tokio-util = { version = "0.3", features = ["compat"] }
-socket2 = "0.3.11"
+socket2 = "0.3.16"
 
 [target.'cfg(windows)'.dependencies]
-winapi = { version = "0.3", default-features = false, features = ["winsock2"] }
+winapi = { version = "0.3.8", default-features = false, features = ["winsock2"] }
 ctor = "0.1"
 
 [build-dependencies]
 lalrpop = "0.19"
 
 [dev-dependencies]
-clap = "2.32.0"
+clap = "2.33"
 quickcheck = { version = "0.9", default-features = false }
 
 [features]
diff --git a/net/Cargo.toml b/net/Cargo.toml
index bb546e3c..9d2c9056 100644
--- a/net/Cargo.toml
+++ b/net/Cargo.toml
@@ -24,22 +24,22 @@ maintenance = { status = "actively-developed" }
 sequoia-openpgp = { path = "../openpgp", version = "0.20", default-features = false }
 sequoia-core = { path = "../core", version = "0.20" }
 
-anyhow = "1"
-futures-util = "0.3"
+anyhow = "1.0.5"
+futures-util = "0.3.5"
 http = "0.2"
 hyper = "0.13"
 hyper-tls = "0.4"
-libc = "0.2.33"
+libc = "0.2.66"
 native-tls = "0.2.0"
 percent-encoding = "2.1"
 tempfile = "3.1"
-thiserror = "1"
+thiserror = "1.0.2"
 url = "2.1"
 zbase32 = "0.1.2"
 
 [dev-dependencies]
 rand = { version = "0.7", default-features = false }
-tokio = { version = "0.2", features = ["full"] }
+tokio = { version = "0.2.19", features = ["full"] }
 
 [features]
 default = ["compression"]
diff --git a/openpgp-ffi/Cargo.toml b/openpgp-ffi/Cargo.toml
index d5dbaf5e..85973bec 100644
--- a/openpgp-ffi/Cargo.toml
+++ b/openpgp-ffi/Cargo.toml
@@ -24,9 +24,9 @@ maintenance = { status = "actively-developed" }
 [dependencies]
 sequoia-ffi-macros = { path = "../ffi-macros", version = "0.20" }
 sequoia-openpgp = { path = "../openpgp", version = "0.20", default-features = false }
-anyhow = "1"
-lazy_static = "1.0.0"
-libc = "0.2.33"
+anyhow = "1.0.5"
+lazy_static = "1.4.0"
+libc = "0.2.66"
 memsec = { version = "0.6", default-features = false }
 
 [dev-dependencies]
diff --git a/openpgp/Cargo.toml b/openpgp/Cargo.toml
index 000de1d0..55be6cd2 100644
--- a/openpgp/Cargo.toml
+++ b/openpgp/Cargo.toml
@@ -25,7 +25,7 @@ gitlab = { repository = "sequoia-pgp/sequoia" }
 maintenance = { status = "actively-developed" }
 
 [dependencies]
-anyhow = "1"
+anyhow = "1.0.5"
 buffered-reader = { path = "../buffered-reader", version = "0.20", default-features = false }
 base64 = "0.13"
 bzip2 = { version = "0.4", optional = true }
@@ -33,13 +33,13 @@ dyn-clone = "1"
 flate2 = { version = "1.0.1", optional = true }
 idna = "0.2"
 lalrpop-util = "0.19"
-lazy_static = "1.3"
-libc = "0.2"
+lazy_static = "1.4.0"
+libc = "0.2.66"
 memsec = { version = "0.6", default-features = false }
 nettle = { version = "7", optional = true }
 regex = "1"
 sha1collisiondetection = { version = "0.2.2", default-features = false, features = ["std"] }
-thiserror = "1"
+thiserror = "1.0.2"
 backtrace = "0.3.46"
 unicode-normalization = "0.1.9"
 
@@ -47,11 +47,11 @@ unicode-normalization = "0.1.9"
 win-crypto-ng = { version = "0.4", features = ["rand", "block-cipher"], optional = true }
 num-bigint-dig = { version = "0.6", default-features = false, optional = true }
 ed25519-dalek = { version = "1", default-features = false, features = ["rand", "u64_backend"], optional = true }
-winapi = { version = "0.3", default-features = false, features = ["bcrypt"], optional = true }
+winapi = { version = "0.3.8", default-features = false, features = ["bcrypt"], optional = true }
 eax = "0.3"
 
 [target.'cfg(all(target_arch = "wasm32", target_os = "unknown"))'.dependencies]
-chrono = { version = "0.4", default-features = false, features = ["std"] }
+chrono = { version = "0.4.10", default-features = false, features = ["std"] }
 
 [build-dependencies]
 lalrpop = "0.19"
diff --git a/sop/Cargo.toml b/sop/Cargo.toml
index 6f5fa9d7..26434378 100644
--- a/sop/Cargo.toml
+++ b/sop/Cargo.toml
@@ -20,10 +20,10 @@ maintenance = { status = "actively-developed" }
 
 [dependencies]
 sequoia-openpgp = { path = "../openpgp", version = "0.20", default-features = false }
-anyhow = "1"
-chrono = "0.4"
-structopt = { version = "0.3.8", default-features = false }
-thiserror = "1"
+anyhow = "1.0.5"
+chrono = "0.4.10"
+structopt = { version = "0.3.11", default-features = false }
+thiserror = "1.0.2"
 
 [[bin]]
 name = "sqop"
diff --git a/sq/Cargo.toml b/sq/Cargo.toml
index fe88d628..03008594 100644
--- a/sq/Cargo.toml
+++ b/sq/Cargo.toml
@@ -29,18 +29,18 @@ sequoia-core = { path = "../core", version = "0.20", default-features = false }
 sequoia-ipc = { path = "../ipc", version = "0.20", default-features = false }
 sequoia-net = { path = "../net", version = "0.20", default-features = false }
 sequoia-store = { path = "../store", version = "0.20", default-features = false }
-anyhow = "1"
-chrono = "0.4"
-clap = "2.32.0"
+anyhow = "1.0.5"
+chrono = "0.4.10"
+clap = "2.33"
 itertools = "0.9"
 prettytable-rs = "0.8.0"
-tempfile = "3.0.4"
+tempfile = "3.1"
 crossterm = "0.13"
-tokio = { version = "0.2", features = ["rt-core", "io-util", "io-driver"] }
+tokio = { version = "0.2.19", features = ["rt-core", "io-util", "io-driver"] }
 rpassword = "5.0"
 
 [build-dependencies]
-clap = "2.32.0"
+clap = "2.33"
 
 [dev-dependencies]
 assert_cli = "0.6"
diff --git a/sqv/Cargo.toml b/sqv/Cargo.toml
index 7821f296..3db60c76 100644
--- a/sqv/Cargo.toml
+++ b/sqv/Cargo.toml
@@ -22,13 +22,12 @@ maintenance = { status = "actively-developed" }
 
 [dependencies]
 sequoia-openpgp = { path = "../openpgp", version = "0.20", default-features = false }
-anyhow = "1"
-chrono = "0.4"
-clap = "2.32.0"
-
+anyhow = "1.0.5"
+chrono = "0.4.10"
+clap = "2.33"
 
 [build-dependencies]
-clap = "2.27.1"
+clap = "2.33"
 
 [dev-dependencies]
 assert_cli = "0.6"
diff --git a/store/Cargo.toml b/store/Cargo.toml
index c5e1c452..ddac2af2 100644
--- a/store/Cargo.toml
+++ b/store/Cargo.toml
@@ -36,14 +36,14 @@ sequoia-openpgp = { path = "../openpgp", version = "0.20", default-features = fa
 sequoia-core = { path = "../core", version = "0.20" }
 sequoia-ipc = { path = "../ipc", version = "0.20", default-features = false }
 sequoia-net = { path = "../net", version = "0.20", default-features = false }
-anyhow = "1"
+anyhow = "1.0.5"
 capnp = "0.13"
 capnp-rpc = "0.13"
-futures-util = "0.3"
+futures-util = "0.3.5"
 rand = { version = "0.7", default-features = false }
 rusqlite = "0.24"
-thiserror = "1"
-tokio = { version = "0.2", features = ["rt-core", "tcp", "io-driver", "time"] }
+thiserror = "1.0.2"
+tokio = { version = "0.2.19", features = ["rt-core", "tcp", "io-driver", "time"] }
 tokio-util = { version = "0.3", features = ["compat"] }
 
 [target.'cfg(target_os="android")'.dependencies.rusqlite]