Vendor things

third-party/vendor/heck/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"
+name = "heck"
+version = "0.4.1"
+authors = ["Without Boats <woboats@gmail.com>"]
+include = [
+    "src/**/*",
+    "LICENSE-*",
+    "README.md",
+    "CHANGELOG.md",
+]
+description = "heck is a case conversion library."
+homepage = "https://github.com/withoutboats/heck"
+documentation = "https://docs.rs/heck"
+readme = "README.md"
+keywords = [
+    "string",
+    "case",
+    "camel",
+    "snake",
+    "unicode",
+]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/withoutboats/heck"
+
+[dependencies.unicode-segmentation]
+version = "1.2.0"
+optional = true
+
+[features]
+default = []
+unicode = ["unicode-segmentation"]