Add docs.rs documentation link to `cxx-build`'s `Cargo.toml`
diff --git a/gen/build/Cargo.toml b/gen/build/Cargo.toml
index 9ef9f93..3d330a3 100644
--- a/gen/build/Cargo.toml
+++ b/gen/build/Cargo.toml
@@ -4,6 +4,7 @@
authors = ["David Tolnay <dtolnay@gmail.com>"]
categories = ["development-tools::build-utils", "development-tools::ffi"]
description = "C++ code generator for integrating `cxx` crate into a Cargo build."
+documentation = "https://docs.rs/cxx-build"
edition = "2018"
exclude = ["build.rs"]
homepage = "https://cxx.rs"
