Add missing docs lint

CHANGELOG.md

@@ -23,6 +23,7 @@
 - verify `cargo fmt` availability and install `rustfmt` via rustup if missing
 - note that the `pyo3` feature requires Python development libraries
 - documented safety requirements for `erase_lifetime`
+- warn about missing documentation by enabling the `missing_docs` lint
 - derive `Clone` and `Debug` for `WeakBytes` and `WeakView`
 - replaced `quickcheck` property tests with `proptest`
 

src/lib.rs

@@ -7,6 +7,7 @@
  */
 
 #![doc = include_str!("../README.md")]
+#![warn(missing_docs)]
 
 /// Core byte container types and traits.
 pub mod bytes;