Disable structopt default features

The 'ansi_term' crate is currrently being flagged as unmaintained.
The dependency tree that is bringing this crate is:

ansi_term 0.12.1
└── clap 2.34.0
└── structopt 0.3.26
└── parsec-service 1.2.0

ansi_term is an optional dependency that we are bringing along.

 * Remove this and other optional dependencies by disabling the
   default-features for structopt.

Signed-off-by: Tomás González <tomasagustin.gonzalezorlando@arm.com>

Author: tgonzalezorlandoarm

Cargo.lock

@@ -15,7 +15,7 @@ rust-version = "1.66.0"
 [dependencies]
 atty = "0.2.14"
 parsec-client = "0.16.0"
-structopt = "0.3.17"
+structopt = { version = "0.3.17", default-features = false }
 thiserror = "1.0.20"
 env_logger = "0.10.0"
 oid = { version = "0.2", features = ["serde_support"] }