Update soketto to version 0.2.3 (#3448)

This version fixes an issue with lifetime elision which causes
compilation to fail on recent rustc versions (e.g. 1.39.0-nightly
(bea0372a1 2019-08-20)).

See https://github.com/paritytech/soketto/pull/1 for more information.

substrate/Cargo.lock

@@ -1959,7 +1959,7 @@ dependencies = [
  "libp2p-core 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "rw-stream-sink 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "soketto 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "soketto 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-codec 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-rustls 0.10.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3647,7 +3647,7 @@ dependencies = [
 
 [[package]]
 name = "soketto"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -5724,7 +5724,7 @@ name = "twox-hash"
 version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -6571,7 +6571,7 @@ dependencies = [
 "checksum slog_derive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9eff3b513cf2e0d1a60e1aba152dc72bedc5b05585722bb3cebd7bcb1e31b98f"
 "checksum smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "ab606a9c5e214920bb66c458cd7be8ef094f813f20fe77a54cc7dbfff220d4b7"
 "checksum snow 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "5a64f02fd208ef15bd2d1a65861df4707e416151e1272d02c8faafad1c138100"
-"checksum soketto 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "db2383e992ba8ba8205cd1169cac2efdf325d3a0da465dc35f63a2074598347e"
+"checksum soketto 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "bceb1a3a15232d013d9a3b7cac9e5ce8e2313f348f01d4bc1097e5e53aa07095"
 "checksum sourcefile 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4bf77cb82ba8453b42b6ae1d692e4cdc92f9a47beaf89a847c8be83f4e328ad3"
 "checksum spin 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "44363f6f51401c34e7be73db0db371c04705d35efbe9f7d6082e03a921a32c55"
 "checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"