make build fail on deprecated

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Build Debug
       run: |
         rustc --version
-        cargo build
+        cargo build --features=fail-on-deprecated
 
     - name: Run tests
       run: cargo test

Cargo.toml

@@ -43,3 +43,6 @@ base64 = "0.13.0"
 lazy_static = "1.4"
 more-asserts = "0.2"
 paste = "1"
+
+[features]
+fail-on-deprecated = []

Makefile

@@ -1,5 +1,5 @@
 build:
-	cargo build --release
+	cargo build --release --features=fail-on-deprecated
 
 install: build
 	sudo cp target/release/onefetch /usr/local/bin

src/main.rs

@@ -1,5 +1,6 @@
 // `error_chain!` can recurse deeply
 #![recursion_limit = "1024"]
+#![cfg_attr(feature="fail-on-deprecated", deny(deprecated))]
 
 use onefetch::{cli::Cli, cli_utils, error::*, info};