Bump structopt from 0.3.18 to 0.3.19

Bumps [structopt](https://github.com/TeXitoi/structopt) from 0.3.18 to 0.3.19.
- [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/v0.3.18...v0.3.19)

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

Cargo.lock

@@ -577,9 +577,9 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "structopt"
-version = "0.3.18"
+version = "0.3.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a33f6461027d7f08a13715659b2948e1602c31a3756aeae9378bfe7518c72e82"
+checksum = "a7a7159e7d0dbcab6f9c980d7971ef50f3ff5753081461eeda120d5974a4ee95"
 dependencies = [
  "clap",
  "lazy_static",
@@ -588,9 +588,9 @@ dependencies = [
 
 [[package]]
 name = "structopt-derive"
-version = "0.4.11"
+version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c92e775028122a4b3dd55d58f14fc5120289c69bee99df1d117ae30f84b225c9"
+checksum = "8fc47de4dfba76248d1e9169ccff240eea2a4dc1e34e309b95b2393109b4b383"
 dependencies = [
  "heck",
  "proc-macro-error",