Set up workspace-wide lints

Cargo.toml

@@ -8,3 +8,12 @@ edition = "2021"
 
 [workspace.dependencies]
 showbits-common.path = "./showbits-common"
+
+[workspace.lints]
+rust.unsafe_code = "forbid"
+rust.future_incompatible = "warn"
+rust.rust_2018_idioms = "warn"
+rust.unused = "warn"
+rust.noop_method_call = "warn"
+rust.single_use_lifetimes = "warn"
+clippy.use_self = "warn"

showbits-common/Cargo.toml

@@ -2,3 +2,6 @@
 name = "showbits-common"
 version.workspace = true
 edition.workspace = true
+
+[lints]
+workspace = true

showbits-thermal-printer/Cargo.toml

@@ -5,3 +5,6 @@ edition.workspace = true
 
 [dependencies]
 showbits-common.workspace = true
+
+[lints]
+workspace = true