Fix CI for nightly

New nightly feature raises a warning if feature usage is incorrect.

Brotli was missing several feature declarations, and in two cases used incorrect `features = ...` instead of `feature = ...`

Author: nyurik

Cargo.toml

@@ -35,12 +35,17 @@ incremental = false
 [features]
 default = ["std"]
 benchmark = ["brotli-decompressor/benchmark"]
+billing = []
 disable-timer = ["brotli-decompressor/disable-timer"]
+disallow_large_window_size = []
 external-literal-probability = []
 ffi-api = ["brotli-decompressor/ffi-api"]
+float64 = []
+floating_point_context_mixing = []
+no-stdlib-ffi-binding = []
 pass-through-ffi-panics = []
 seccomp = ["brotli-decompressor/seccomp"]
+simd = []
 std = ["alloc-stdlib", "brotli-decompressor/std"]
 validation = ["sha2"]
 vector_scratch_space = []
-simd = []

src/enc/weights.rs

@@ -87,7 +87,7 @@ fn normalize_weights(weights: &mut [i32; 2]) {
 }
 
 #[allow(dead_code)]
-#[cfg(features = "floating_point_context_mixing")]
+#[cfg(feature = "floating_point_context_mixing")]
 fn compute_new_weight(
     probs: [Prob; 2],
     weighted_prob: Prob,
@@ -115,7 +115,7 @@ fn compute_new_weight(
 }
 
 #[allow(dead_code)]
-#[cfg(not(features = "floating_point_context_mixing"))]
+#[cfg(not(feature = "floating_point_context_mixing"))]
 #[inline(always)]
 fn compute_new_weight(
     probs: [Prob; 2],