feat(quickjs): add quickjs

from: https://crates.io/crates/quick-js

quickjs/external/quickjs-rs/libquickjs-sys/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+edition = "2018"
+name = "libquickjs-sys"
+description = "QuickJS Javascript Engine FFI bindings"
+version = "0.7.0"
+readme = "README.md"
+documentation = "https://docs.rs/quickjs-sys"
+repository = "https://github.com/theduke/quickjs-rs"
+license = "MIT"
+authors = ["Christoph Herzog <chris@theduke.at>"]
+categories = ["external-ffi-bindings"]
+keywords = ["quickjs"]
+
+build = "build.rs"
+
+[features]
+bundled = ["cc", "copy_dir"]
+patched = ["bundled"]
+default = ["bundled"]
+
+system = ["bindgen"]
+
+[build-dependencies]
+bindgen = { version = "0.54.0", optional = true }
+cc = { version = "1.0", optional = true }
+copy_dir = { version = "0.1.2", optional = true }