Removing the lint features and invoking cargo clippy manually instead

.travis.yml

@@ -3,8 +3,15 @@ language: rust
 cache: cargo
 rust:
   - nightly
+  - nightly-2019-03-23
   - beta
   - stable
+  - 1.30.0
+matrix:
+    allow_failures:
+        - rust: nightly
+    nightly-2019-03-23:
+        - script: cargo clippy
 before_script:
   - |
     pip install git+git://github.com/kbknapp/travis-cargo.git --user &&
@@ -49,5 +56,4 @@ after_success:
     echo "Uploaded code coverage"
 env:
   global:
-    - TRAVIS_CARGO_NIGHTLY_FEATURE=lints
     - secure: JLBlgHY6OEmhJ8woewNJHmuBokTNUv7/WvLkJGV8xk0t6bXBwSU0jNloXwlH7FiQTc4TccX0PumPDD4MrMgxIAVFPmmmlQOCmdpYP4tqZJ8xo189E5zk8lKF5OyaVYCs5SMmFC3cxCsKjfwGIexNu3ck5Uhwe9jI0tqgkgM3URA=

Cargo.toml

@@ -74,8 +74,8 @@ color       = ["ansi_term", "atty"]
 wrap_help   = ["term_size", "textwrap/term_size"]
 derive      = ["clap_derive"]
 yaml        = ["yaml-rust"]
-unstable    = [] # for building with unstable clap features (doesn't require nightly Rust)
-nightly     = [] # for building with unstable Rust features
+unstable    = [] # for building with unstable clap features (doesn't require nightly Rust) (currently none)
+nightly     = [] # for building with unstable Rust features (currently none)
 debug       = [] # Enables debug messages
 no_cargo    = [] # Enable if you're not using Cargo, disables Cargo-env-var-dependent macros
 doc         = ["yaml"] # All the features which add to documentation

src/lib.rs

@@ -516,21 +516,9 @@
 //! [license]: https://raw.githubusercontent.com/kbknapp/clap-rs/master/LICENSE-MIT
 
 #![crate_type = "lib"]
-#![doc(html_root_url = "https://docs.rs/clap/3.0.0-beta.1")]
-#![deny(
-    missing_docs,
-    missing_debug_implementations,
-    missing_copy_implementations,
-    trivial_casts,
-    unused_import_braces,
-    unused_allocation
-)]
-// @TODO @v3-beta: remove me!
-#![allow(deprecated)]
-#![cfg_attr(
-    not(any(feature = "lints", feature = "nightly")),
-    forbid(unstable_features)
-)]
+#![doc(html_root_url = "https://docs.rs/clap/2.32.0")]
+#![deny(missing_docs, missing_debug_implementations, missing_copy_implementations, trivial_casts,
+        unused_import_braces, unused_allocation, trivial_numeric_casts)]
 // Need to disable deny(warnings) while deprecations are active
 // #![cfg_attr(feature = "lints", deny(warnings))]
 #![cfg_attr(feature = "lints", feature(plugin))]