* Add an instance limit to `Config`
This commit adds a new parameter to `Config` which limits the number of
instances that can be created within a store connected to that `Config`.
The intention here is to provide a default safeguard against
module-linking modules that recursively create too many instances.
* Update crates/c-api/include/wasmtime.h
Co-authored-by: Peter Huene <peter@huene.dev>
Co-authored-by: Peter Huene <peter@huene.dev>
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