Update include.

Author: PsiACE

Cargo.toml

@@ -15,5 +15,12 @@ categories = ["data-structures"]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+include = [
+  "Cargo.toml",
+  "LICENSE-APACHE",
+  "LICENSE-MIT",
+  "src/**/*"
+]
+
 [dependencies]
 twox-hash = "1.5.0"