Vendor dependencies

Let's see how I like this workflow.

vendor/tokio/Cargo.toml

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+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+rust-version = "1.49"
+name = "tokio"
+version = "1.23.0"
+authors = ["Tokio Contributors <team@tokio.rs>"]
+description = """
+An event-driven, non-blocking I/O platform for writing asynchronous I/O
+backed applications.
+"""
+homepage = "https://tokio.rs"
+readme = "README.md"
+keywords = [
+    "io",
+    "async",
+    "non-blocking",
+    "futures",
+]
+categories = [
+    "asynchronous",
+    "network-programming",
+]
+license = "MIT"
+repository = "https://github.com/tokio-rs/tokio"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = [
+    "--cfg",
+    "docsrs",
+    "--cfg",
+    "tokio_unstable",
+]
+rustc-args = [
+    "--cfg",
+    "tokio_unstable",
+]
+
+[package.metadata.playground]
+features = [
+    "full",
+    "test-util",
+]
+
+[dependencies.bytes]
+version = "1.0.0"
+optional = true
+
+[dependencies.memchr]
+version = "2.2"
+optional = true
+
+[dependencies.mio]
+version = "0.8.4"
+optional = true
+
+[dependencies.num_cpus]
+version = "1.8.0"
+optional = true
+
+[dependencies.parking_lot]
+version = "0.12.0"
+optional = true
+
+[dependencies.pin-project-lite]
+version = "0.2.0"
+
+[dependencies.tokio-macros]
+version = "1.7.0"
+optional = true
+
+[dev-dependencies.async-stream]
+version = "0.3"
+
+[dev-dependencies.futures]
+version = "0.3.0"
+features = ["async-await"]
+
+[dev-dependencies.mockall]
+version = "0.11.1"
+
+[dev-dependencies.tempfile]
+version = "3.1.0"
+
+[dev-dependencies.tokio-stream]
+version = "0.1"
+
+[dev-dependencies.tokio-test]
+version = "0.4.0"
+
+[build-dependencies.autocfg]
+version = "1.1"
+
+[features]
+default = []
+fs = []
+full = [
+    "fs",
+    "io-util",
+    "io-std",
+    "macros",
+    "net",
+    "parking_lot",
+    "process",
+    "rt",
+    "rt-multi-thread",
+    "signal",
+    "sync",
+    "time",
+]
+io-std = []
+io-util = [
+    "memchr",
+    "bytes",
+]
+macros = ["tokio-macros"]
+net = [
+    "libc",
+    "mio/os-poll",
+    "mio/os-ext",
+    "mio/net",
+    "socket2",
+    "windows-sys/Win32_Foundation",
+    "windows-sys/Win32_Security",
+    "windows-sys/Win32_Storage_FileSystem",
+    "windows-sys/Win32_System_Pipes",
+    "windows-sys/Win32_System_SystemServices",
+]
+process = [
+    "bytes",
+    "libc",
+    "mio/os-poll",
+    "mio/os-ext",
+    "mio/net",
+    "signal-hook-registry",
+    "windows-sys/Win32_Foundation",
+    "windows-sys/Win32_System_Threading",
+    "windows-sys/Win32_System_WindowsProgramming",
+]
+rt = []
+rt-multi-thread = [
+    "num_cpus",
+    "rt",
+]
+signal = [
+    "libc",
+    "mio/os-poll",
+    "mio/net",
+    "mio/os-ext",
+    "signal-hook-registry",
+    "windows-sys/Win32_Foundation",
+    "windows-sys/Win32_System_Console",
+]
+stats = []
+sync = []
+test-util = [
+    "rt",
+    "sync",
+    "time",
+]
+time = []
+
+[target."cfg(all(any(target_arch = \"wasm32\", target_arch = \"wasm64\"), not(target_os = \"wasi\")))".dev-dependencies.wasm-bindgen-test]
+version = "0.3.0"
+
+[target."cfg(docsrs)".dependencies.windows-sys]
+version = "0.42.0"
+features = [
+    "Win32_Foundation",
+    "Win32_Security_Authorization",
+]
+
+[target."cfg(loom)".dev-dependencies.loom]
+version = "0.5.2"
+features = [
+    "futures",
+    "checkpoint",
+]
+
+[target."cfg(not(all(any(target_arch = \"wasm32\", target_arch = \"wasm64\"), target_os = \"unknown\")))".dev-dependencies.rand]
+version = "0.8.0"
+
+[target."cfg(not(any(target_arch = \"wasm32\", target_arch = \"wasm64\")))".dependencies.socket2]
+version = "0.4.4"
+features = ["all"]
+optional = true
+
+[target."cfg(not(any(target_arch = \"wasm32\", target_arch = \"wasm64\")))".dev-dependencies.proptest]
+version = "1"
+
+[target."cfg(not(any(target_arch = \"wasm32\", target_arch = \"wasm64\")))".dev-dependencies.socket2]
+version = "0.4"
+
+[target."cfg(target_os = \"freebsd\")".dev-dependencies.mio-aio]
+version = "0.6.0"
+features = ["tokio"]
+
+[target."cfg(tokio_unstable)".dependencies.tracing]
+version = "0.1.25"
+features = ["std"]
+optional = true
+default-features = false
+
+[target."cfg(unix)".dependencies.libc]
+version = "0.2.42"
+optional = true
+
+[target."cfg(unix)".dependencies.signal-hook-registry]
+version = "1.1.1"
+optional = true
+
+[target."cfg(unix)".dev-dependencies.libc]
+version = "0.2.42"
+
+[target."cfg(unix)".dev-dependencies.nix]
+version = "0.24"
+features = [
+    "fs",
+    "socket",
+]
+default-features = false
+
+[target."cfg(windows)".dependencies.windows-sys]
+version = "0.42.0"
+optional = true
+
+[target."cfg(windows)".dev-dependencies.ntapi]
+version = "0.3.6"