Update the crates.io publishing scripts (#580)

* Fix fuzz target compilation.

* Bump version to 0.7.0

* Temporarily disable fuzz tests

Temporarily disable fuzz tests until https://github.com/bytecodealliance/cranelift/issues/1216 is resolved.

* Fix publish-all.sh to not modify the witx crate.

* Remove the "publish = false" attribute from Lightbeam.

* Add a README.md for wasmtime-interface-types.

* Remove the "rust" category.

This fixes the following warning:

warning: the following are not valid category slugs and were ignored: rust. Please see https://crates.io/category_slugs for the list of all category slugs.

* Mark wasmtime-cli as "publish = false".

* Sort the publishing rules in topological order.

Also, publish nightly-only crates with cargo +nightly.

crates/environ/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "wasmtime-environ"
-version = "0.2.0"
+version = "0.7.0"
 authors = ["The Wasmtime Project Developers"]
 description = "Standalone environment support for WebAsssembly code in Cranelift"
 license = "Apache-2.0 WITH LLVM-exception"
@@ -15,6 +15,7 @@ edition = "2018"
 cranelift-codegen = { version = "0.50.0", features = ["enable-serde"] }
 cranelift-entity = { version = "0.50.0", features = ["enable-serde"] }
 cranelift-wasm = { version = "0.50.0", features = ["enable-serde"] }
+wasmparser = "0.39.2"
 lightbeam = { path = "../lightbeam", optional = true }
 indexmap = "1.0.2"
 rayon = "1.2"