chore: checkpoint before Python removal

vendor/stable_deref_trait/Cargo.toml

@@ -0,0 +1,41 @@
+# 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]
+name = "stable_deref_trait"
+version = "1.2.1"
+authors = ["Robert Grosse <n210241048576@gmail.com>"]
+build = false
+autolib = false
+autobins = false
+autoexamples = false
+autotests = false
+autobenches = false
+description = """
+An unsafe marker trait for types like Box and Rc that dereference to a stable address even when moved, and hence can be used with libraries such as owning_ref and rental.
+"""
+documentation = "https://docs.rs/stable_deref_trait/1.2.1/stable_deref_trait"
+readme = "README.md"
+categories = [
+    "memory-management",
+    "no-std",
+]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/storyyeller/stable_deref_trait"
+
+[features]
+alloc = []
+default = ["std"]
+std = ["alloc"]
+
+[lib]
+name = "stable_deref_trait"
+path = "src/lib.rs"