Prepare for 0.16.1 release

Fix `wax` command packaging for install script

Prepare for 0.16.0 release

Updated Windows Wasmer icons. Add wax

feat(interface-types) Implement string and memory instructions

1281: feat(interface-types) Rename `call` to `call-core`, and remove `call-export` r=syrusakbary a=Hywan

The latest standard removes `call-export` and has a single `call-core` instruction.

Co-authored-by: Ivan Enderlin <ivan.enderlin@hoa-project.net>

doc(interface-types) Improve the `README.md`

1262: Update to latest inkwell which adds context lifetime to basic blocks. r=nlewycky a=nlewycky

The latest inkwell adds lifetimes to basic blocks and also changes most APIs to pass them without reference.

Co-authored-by: Nick Lewycky <nick@wasmer.io>

1272: Fix WasmPtr to work with accesses accessing the final valid byte r=MarkMcCaskey a=MarkMcCaskey

Resolves #1258 

The fix was to change `>=` into `>`.  Doing this made us vulnerable to accessing memory to create an empty slice just out of bounds so we have to add some additional checks to make sure that that can't happen.

This PR also prevents accessing arrays of length 0 (the length bound is non-inclusive, so length 0 is never valid) and prevents access of zero-sized types.

The zero-sized type checks will probably be inlined (or will be in the future as `const fn` gets more mature) so provide no additional overhead.  The checking of if length == 0 does add some overhead, but on modern CPUs it shouldn't be an issue as it's a branch that should be always false in normal use.

# Review

- [x] Add a short description of the the change to the CHANGELOG.md file


Co-authored-by: Mark McCaskey <mark@wasmer.io>

This also returns `None` for all accesses of zero sized types and
arrays of length 0.  Because the array accesses have a non-inclusive
length, length of 0 is not valid.  These checks prevent returning
empty slices that point just outside of memory bounds.

1268: Prepare for 0.15.0 release r=MarkMcCaskey a=MarkMcCaskey



# Review

- [x] Add a short description of the the change to the CHANGELOG.md file


Co-authored-by: Mark McCaskey <mark@wasmer.io>

1267: Improve support for preopened directories in WASI syscalls r=MarkMcCaskey a=MarkMcCaskey

Ported over from #1263 

# Description
<!-- 
Provide details regarding the change including motivation,
links to related issues, and the context of the PR.
-->

# Review

- [x] Add a short description of the the change to the CHANGELOG.md file


Co-authored-by: Mark McCaskey <mark@wasmer.io>

Also filters our default logging more and improves some debug statements

1264: feat(interface-types) Implement lifting and lowering instructions r=Hywan a=Hywan

For the moment, WIT defines [a bunch of lifting and lowering instructions](https://github.com/WebAssembly/interface-types/blob/master/proposals/interface-types/working-notes/instr.md

). The encoders, the decoders and the AST support them, but we didn't have any instruction implementations for them. This PR implements the instructions for real.

To handle casting failure, I decided to use the `TryFrom` trait, instead of `as`, such as:

```rust
let x: i32 = 128;
let y: i8 = x.try_into().unwrap(); // fails
```

while:

```rust
let x: i32 = 128;
let y: i8 = x as _; // just overflows silently
```

Not all `*x` instructions aren't implement _yet_.

Co-authored-by: Ivan Enderlin <ivan.enderlin@hoa-project.net>