chore(deps): bump tracing-subscriber from 0.2.19 to 0.2.20 (#389)

Bumps [tracing-subscriber](https://github.com/tokio-rs/tracing) from 0.2.19 to 0.2.20.
- [Release notes](https://github.com/tokio-rs/tracing/releases)
- [Commits](https://github.com/tokio-rs/tracing/compare/tracing-subscriber-0.2.19...tracing-subscriber-0.2.20)

---
updated-dependencies:
- dependency-name: tracing-subscriber
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.lock

@@ -2836,9 +2836,9 @@ dependencies = [
 
 [[package]]
 name = "tracing-subscriber"
-version = "0.2.19"
+version = "0.2.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab69019741fca4d98be3c62d2b75254528b5432233fd8a4d2739fec20278de48"
+checksum = "b9cbe87a2fa7e35900ce5de20220a582a9483a7063811defce79d7cbd59d4cfe"
 dependencies = [
  "ansi_term",
  "chrono",

ethers-signers/Cargo.toml

@@ -43,7 +43,7 @@ yubihsm = { version = "0.39.0", features = ["secp256k1", "usb", "mockhsm"] }
 tempfile = "3.2.0"
 tokio = { version = "1.5", default-features = false, features = ["macros"] }
 
-tracing-subscriber = "0.2.19"
+tracing-subscriber = "0.2.20"
 
 [features]
 celo = ["ethers-core/celo"]