Include LICENSE file (#134)

This is needed for packaging in distributions like Fedora

```
❯ cargo package --allow-dirty --list | grep LICENSE
    Updating crates.io index
LICENSE
```

Signed-off-by: Michel Lind <salimma@fedoraproject.org>

Author: michel-slm

Cargo.toml

@@ -10,6 +10,7 @@ license = "Apache-2.0"
 
 build = "bindings/rust/build.rs"
 include = [
+  "LICENSE",
   "bindings/rust/*",
   "grammar.js",
   "queries/*",