Bump structopt from 0.3.17 to 0.3.20

Bumps [structopt](https://github.com/TeXitoi/structopt) from 0.3.17 to 0.3.20.
- [Release notes](https://github.com/TeXitoi/structopt/releases)
- [Changelog](https://github.com/TeXitoi/structopt/blob/master/CHANGELOG.md)
- [Commits](https://github.com/TeXitoi/structopt/compare/v0.3.17...v0.3.20)

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

Cargo.lock

@@ -2099,9 +2099,9 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "structopt"
-version = "0.3.17"
+version = "0.3.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6cc388d94ffabf39b5ed5fadddc40147cb21e605f53db6f8f36a625d27489ac5"
+checksum = "126d630294ec449fae0b16f964e35bf3c74f940da9dca17ee9b905f7b3112eb8"
 dependencies = [
  "clap",
  "lazy_static",
@@ -2110,9 +2110,9 @@ dependencies = [
 
 [[package]]
 name = "structopt-derive"
-version = "0.4.10"
+version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e2513111825077552a6751dfad9e11ce0fba07d7276a3943a037d7e93e64c5f"
+checksum = "65e51c492f9e23a220534971ff5afc14037289de430e3c83f9daf6a1b6ae91e8"
 dependencies = [
  "heck",
  "proc-macro-error",

Cargo.toml

@@ -20,7 +20,7 @@ reqwest = "0.10.8"
 serde = "1.0.117"
 serde_derive = "1.0.103"
 serde_json = "1.0.59"
-structopt = "0.3.17"
+structopt = "0.3.20"
 actix-rt = "1.1.1"
 
 [build-dependencies]