fix: disable warnings in CI

also remove the COLUMNS setting that's been fucking up my CLI tests

Author: obmarg

.github/workflows/rust.yml

@@ -7,10 +7,8 @@ on:
     branches: [main]
 
 env:
-  COLUMNS: 250
   CARGO_INCREMENTAL: 0
-  # TODO: Would be nice to disable warnings here too, but there are too many of them.
-  RUSTFLAGS: "-W rust-2021-compatibility"
+  RUSTFLAGS: "-W rust-2021-compatibility -D warnings"
   RUST_BACKTRACE: short
   NEXTEST_PROFILE: ci
   CI: 1

tests/ui-tests/tests/cases/enum-guess-validation.rs

@@ -9,6 +9,7 @@ mod schema {
     schema_path = "../../../../schemas/simple.graphql",
     graphql_type = "Desseqt"
 )]
+#[allow(non_camel_case_types)]
 enum Dessert {
     CHEESECAKE,
     ICE_CREAM,