Vendor dependencies

Let's see how I like this workflow.

vendor/tokio/src/fs/create_dir_all.rs

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+use crate::fs::asyncify;
+
+use std::io;
+use std::path::Path;
+
+/// Recursively creates a directory and all of its parent components if they
+/// are missing.
+///
+/// This is an async version of [`std::fs::create_dir_all`][std]
+///
+/// [std]: std::fs::create_dir_all
+///
+/// # Platform-specific behavior
+///
+/// This function currently corresponds to the `mkdir` function on Unix
+/// and the `CreateDirectory` function on Windows.
+/// Note that, this [may change in the future][changes].
+///
+/// [changes]: https://doc.rust-lang.org/std/io/index.html#platform-specific-behavior
+///
+/// # Errors
+///
+/// This function will return an error in the following situations, but is not
+/// limited to just these cases:
+///
+/// * If any directory in the path specified by `path` does not already exist
+/// and it could not be created otherwise. The specific error conditions for
+/// when a directory is being created (after it is determined to not exist) are
+/// outlined by [`fs::create_dir`].
+///
+/// Notable exception is made for situations where any of the directories
+/// specified in the `path` could not be created as it was being created concurrently.
+/// Such cases are considered to be successful. That is, calling `create_dir_all`
+/// concurrently from multiple threads or processes is guaranteed not to fail
+/// due to a race condition with itself.
+///
+/// [`fs::create_dir`]: std::fs::create_dir
+///
+/// # Examples
+///
+/// ```no_run
+/// use tokio::fs;
+///
+/// #[tokio::main]
+/// async fn main() -> std::io::Result<()> {
+///     fs::create_dir_all("/some/dir").await?;
+///     Ok(())
+/// }
+/// ```
+pub async fn create_dir_all(path: impl AsRef<Path>) -> io::Result<()> {
+    let path = path.as_ref().to_owned();
+    asyncify(move || std::fs::create_dir_all(path)).await
+}