chore: forbit unsafe code

README.md

@@ -1,5 +1,6 @@
 # itconfig
 [![Build Status](https://travis-ci.org/icetemple/itconfig-rs.svg?branch=master)](https://travis-ci.org/icetemple/itconfig-rs)
+[![unsafe forbidden](https://img.shields.io/badge/unsafe-forbidden-success.svg)](https://github.com/rust-secure-code/safety-dance/)
 [![Documentation](https://docs.rs/itconfig/badge.svg)](https://docs.rs/itconfig)
 [![Crates.io](https://img.shields.io/badge/crates.io-v1.0.1-blue.svg?longCache=true)](https://crates.io/crates/itconfig) 
 [![Join the chat at https://gitter.im/icetemple/itconfig-rs](https://badges.gitter.im/icetemple/itconfig-rs.svg)](https://gitter.im/icetemple/itconfig-rs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)

itconfig-macro/src/lib.rs

@@ -1,4 +1,5 @@
 #![recursion_limit = "256"]
+#![forbid(unsafe_code)]
 
 mod ast;
 mod expand;

itconfig/src/lib.rs

@@ -137,9 +137,9 @@
 //!
 
 // Rustc lints.
+#![forbid(unsafe_code)]
 #![deny(
     missing_debug_implementations,
-    unsafe_code,
     unstable_features,
     unused_imports,
     unused_qualifications