Bump structopt from 0.3.17 to 0.3.18 (#713)

Bumps [structopt](https://github.com/TeXitoi/structopt) from 0.3.17 to 0.3.18.
- [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...v0.3.18)

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

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

Cargo.lock

@@ -1000,9 +1000,9 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "structopt"
-version = "0.3.17"
+version = "0.3.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6cc388d94ffabf39b5ed5fadddc40147cb21e605f53db6f8f36a625d27489ac5"
+checksum = "a33f6461027d7f08a13715659b2948e1602c31a3756aeae9378bfe7518c72e82"
 dependencies = [
  "clap",
  "lazy_static",
@@ -1011,9 +1011,9 @@ dependencies = [
 
 [[package]]
 name = "structopt-derive"
-version = "0.4.10"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e2513111825077552a6751dfad9e11ce0fba07d7276a3943a037d7e93e64c5f"
+checksum = "c92e775028122a4b3dd55d58f14fc5120289c69bee99df1d117ae30f84b225c9"
 dependencies = [
  "heck",
  "proc-macro-error",

boa_cli/Cargo.toml

@@ -14,7 +14,7 @@ edition = "2018"
 Boa = { path = "../boa", features = ["serde"] }
 rustyline = "6.3.0"
 rustyline-derive = "0.3.1"
-structopt = "0.3.17"
+structopt = "0.3.18"
 serde_json = "1.0.57"
 colored = "2.0.0"
 regex = "1.3.9"

tester/Cargo.toml

@@ -12,7 +12,7 @@ edition = "2018"
 
 [dependencies]
 Boa = { path = "../boa" }
-structopt = "0.3.17"
+structopt = "0.3.18"
 serde = { version = "1.0.116", features = ["derive"] }
 serde_yaml = "0.8.13"
 serde_json = "1.0.57"