Zig 0.15.2 compatibility

[nbaertsch]

Minor changes for 0.15.2

• ArrayHashMap.put() now requires allocator as first parameter
• ArrayList.append() now requires allocator as first parameter

These changes are required for Zig 0.15.2 which changed the API for managed data structures to take the allocator explicitly.

[malcolmstill]

@nbaertsch thanks for this fix. I think we may also want to bump the build.zig.zon .minimum_zig_version (https://github.com/malcolmstill/zware/blob/master/build.zig.zon#L5) to 0.15.2 whilst we're at it? Do you want to make that change too?

I also notice we don't have any tests that cover this (i.e. anything in a test that compiles fn addWasiPreopen, fn forwardArgs) hence why it was missed. Will have a think about how to include such a test (let me know if you have any ideas).

[nbaertsch]

bumped version. Still getting up to speed on the codebase and WASM in general TBH but I can implement some simple unit tests in this PR prior to merge.

[nbaertsch]

Not sure how you want to test fn forwardArgs, but I've added some simple unit tests for addWasiPreopen.

[nbaertsch]

Skip windows test for now since zware doesn't look like it supports it today. I plan on looking into Windows compilation target in a different branch (someday soon hopefully).

[malcolmstill]

Thanks @nbaertsch!