Ignore decimal_literal_representation lint

The number 4096 is used to cap the size of collections that we preallocate.

    cmp::min(hint.unwrap_or(0), 4096)

I find this number more understandable than 0x1000.

serde/src/lib.rs

@@ -104,6 +104,7 @@
 // simplifies some macros
     invalid_upcast_comparisons,
 // things are often more readable this way
+    decimal_literal_representation,
     option_unwrap_used,
     result_unwrap_used,
     shadow_reuse,